Front End Developer Course in Ahmedabad

Q. 1 What is the 16-bit compiler allowable range for integer constants ?

A. -3.4e38 to 3.4e38
B. -32767 to 32768
C. -32668 to 32667
D. -32768 to 32767

Correct Answer: D. -32768 to 32767

Q. 2 What is required in each C program ?

A. The program must have at least one function.
B. The program does not require any function.
C. Input data
D. Output data

Correct Answer: A. The program must have at least one function.

Q. 3 Which of the following comment is correct when a macro definition includes arguments ?

A. The opening parenthesis should immediately follow the macro name.
B. There should be at least one blank between the macro name and the opening parenthesis
C. There should be only one blank between the macro name and the opening parenthesis.
D. All the above comments are correct.

Correct Answer: A. The opening parenthesis should immediately follow the macro name.

Q. 4 What is a lint ?

A. C compiler
B. Interactive debugger
C. Analyzing tool
D. C interpreter

Correct Answer: C. Analyzing tool

Q. 5 What is the output of this statement ''printf(''%d'', (a++))'' ?

A. The value of (a + 1)
B. The current value of a
C. Error message
D. Garbage

Correct Answer: B. The current value of a

Q. 6 Why is a macro used in place of a function ?

A. It reduces execution time.
B. It reduces code size.
C. It increases execution time.
D. It increases code size.

Correct Answer: A. It reduces execution time.

Q. 7 In the C language, the constant is defined _______.

A. Before main
B. After main
C. Anywhere, but starting on a new line.
D. None of the these.

Correct Answer: C. Anywhere, but starting on a new line.

Q. 8 A pointer is a memory address. Suppose the pointer variable has p address 1000, and that p is declared to have type int*, and an int is 4 bytes long. What address is represented by expression p + 2 ?

A. 1002
B. 1004
C. 1006
D. 1008

Correct Answer: D. 1008

Q. 9 Which one of the following is a loop construct that will always be executed once ?

A. for
B. while
C. switch
D. do while

Correct Answer: D. do while

Q. 10 How many characters can a string hold when declared as follows ? char name[20]:

A. 18 char
B. 19 char
C. 20 char
D. None of the these

Correct Answer: C. 20 char

Q. 11 Directives are translated by the

A. Pre-processor
B. Compiler
C. Linker
D. Editor

Correct Answer: A. Pre-processor

Q. 12 How many bytes does **int = D** use ?

A. 0 bytes
B. 1 bytes
C. 2 or 4 bytes
D. 10 bytes

Correct Answer: C. 2 or 4 bytes

Q. 13 What is the maximum number of characters that can be held in the string variable char address line [40] ?

A. 38 characters
B. 39 characters
C. 40 characters
D. 41 characters

Correct Answer: B. 39 characters

Q. 14 Which one is the correct description for the variable balance declared below ? int ** balance;

A. Balance is a point to an integer
B. Balance is a pointer to a pointer to an integer
C. Balance is a pointer to a pointer to a pointer to an integer
D. Balance is an array of integer

Correct Answer: B. Balance is a pointer to a pointer to an integer

Q. 15 Which of the following statement is not true ?

A. A pointer to an int and a pointer to a double are of the same size.
B. A pointer must point to a data item on the heap (free store).
C. A pointer can be reassigned to point to another data item.
D. A pointer can point to an array.

Correct Answer: B. A pointer must point to a data item on the heap (free store).

Q. 16 Let p1 be an integer pointer with a current value of 2000. What is the content of p1 after the expression p1++ has been evaluated ?

A. 2001 value
B. 2002 value
C. 2004 value
D. 2008 value

Correct Answer: C. 2004 value

Q. 17 Let p1 and p2 be integer pointers. Which one is a syntactically wrong statement ?

A. p1 = p1 + p2;
B. p1 = p1 - 9;
C. p2 = p2 + 9;
D. printf(**%d**,p1 - p2);

Correct Answer: A. p1 = p1 + p2;

Q. 18 Suppose that cPtr is a character pointer, and its current content is 300. What will be the new value in cPtr after the following assignment ? cPtr = cPtr + 5;

A. value 305
B. value 310
C. value 320
D. value 340

Correct Answer: A. value 305

Q. 19 Which is valid expression in C language ?

A. int my_num = 100,000;
B. int my_num = 100000;
C. int my num = 1000;
D. int my num == 10000;

Correct Answer: B. int my_num = 100000;

Q. 20 Who is the father of C language ?

A. Steve Jobs
B. James Gosling
C. Dennis Ritchie
D. Rasmus Lerdorf

Correct Answer: C. Dennis Ritchie

Q. 21 All keywords in C are in ____________

A. LowerCase letters
B. UpperCase letters
C. CamelCase letters
D. None of the mentioned

Correct Answer: A. LowerCase letters

Q. 22 Which of the following is true for variable names in C ?

A. FThey can contain alphanumeric characters as well as special characters
B. It is not an error to declare a variable to be one of the keywords(like goto, static)
C. Variable names cannot start with a digit
D. Variable can be of any length

Correct Answer: C. Variable names cannot start with a digit

Q. 23 Which of the following cannot be a variable name in C ?

A. volatile
B. true
C. friend
D. export

Correct Answer: A. volatile

Q. 24 Which of the following declaration is not supported by C language ?

A. String str;
B. char *str;
C. float str = 3e2;
D. Both String str; & float str = 3e2;

Correct Answer: A. String str;

Q. 25 Which keyword is used to prevent any changes in the variable within a C program ?

A. immutable
B. mutable
C. const
D. volatile

Correct Answer: C. const

Q. 26 What is the result of logical or relational expression in C ?

A. True or False
B. 0 or 1
C. 0 if an expression is false and any positive number if an expression is true
D. None of the mentioned

Correct Answer: B. 0 or 1

Q. 27 Where in C the order of precedence of operators do not exist ?

A. Within conditional statements, if, else
B. Within while, do-while
C. Within a macro definition
D. None of the mentioned

Correct Answer: D. None of the mentioned

Q. 28 What is an example of iteration in C ?

A. for
B. while
C. do-while
D. all of the mentioned

Correct Answer: D. all of the mentioned

Q. 29 Functions can return enumeration constants in C ?

A. true
B. false
C. depends on the compiler
D. depends on the standard

Correct Answer: A. true

Q. 30 Functions in C Language are always _________

A. Internal
B. External
C. Both Internal and External
D. External and Internal are not valid terms for functions

Correct Answer: B. External

Q. 31 Which of following is not accepted in C ?

A. static a = 10; //static as
B. static int func (int); //parameter as static
C. static static int a; //a static variable prefixed with static
D. all of the mentioned

Correct Answer: C. static static int a; //a static variable prefixed with static

Q. 32 Property which allows to produce different executable for different platforms in C is called ?

A. File inclusion
B. Selective inclusion
C. Conditional compilation
D. Recursive macros

Correct Answer: C. Conditional compilation

Q. 33 What is #include ?

A. Preprocessor directive
B. Inclusion directive
C. File inclusion directive
D. None of the mentioned

Correct Answer: A. Preprocessor directive

Q. 34 C preprocessors can have compiler specific features.

A. True
B. False
C. Depends on the standard
D. Depends on the platform

Correct Answer: A. True

Q. 35 The C-preprocessors are specified with _________ symbol.

A. #
B. $
C. ""
D. &

Correct Answer: A. #

Q. 36 How many number of pointer (*) does C have against a pointer variable declaration ?

A. 7 pointer
B. 127 pointer
C. 255 pointer
D. No limits

Correct Answer: D. No limits

Q. 37 Which of the following is not possible statically in C language ?

A. Jagged Array
B. Rectangular Array
C. Cuboidal Array
D. Multidimensional Array

Correct Answer: A. Jagged Array

Q. 38 which of the following return-type cannot be used for a function in C ?

A. char *
B. struct
C. void
D. none of the mentioned

Correct Answer: D. none of the mentioned

Q. 39 When a C program is started, O.S environment is responsible for opening file and providing pointer for that file ?

A. Standard input
B. Standard output
C. Standard error
D. All of the mentioned

Correct Answer: D. All of the mentioned

Q. 40 In C language, FILE is of which data type ?

A. int
B. char *
C. struct
D. none of the mentioned

Correct Answer: C. struct

Q. 41 What is the sizeof(char) in a 32-bit C compiler ?

A. 1 bit
B. 2 bits
C. 1 Byte
D. 2 Bytes

Correct Answer: C. 1 Byte

Q. 42 scanf() is a predefined function in______header file.

A. stdlib. h
B. ctype. h
C. stdio. h
D. stdarg. h

Correct Answer: C. stdio. h

Q. 43 C Language develop at‌‌‌‌______?

A. AT & T's Bell Laboratories of USA in 1972
B. AT & T's Bell Laboratories of USA in 1970
C. Sun Microsystems in 1973
D. Cambridge University in 1972

Correct Answer: A. AT & T's Bell Laboratories of USA in 1972

Q. 44 C programs are convert into machine language with help of

A. An Editor
B. A compiler
C. An operating system
D. None of these.

Correct Answer: B. A compiler

Q. 45 C was primarily Developed as

A. System programming language
B. General purpose language
C. Data processing language
D. None of the above.

Correct Answer: A. System programming language

Q. 46 Standard ANSI C recongnizes________number of keyboards ?

A. 30 keywords
B. 32 keywords
C. 36 keywords
D. 24 keywords

Correct Answer: B. 32 keywords

Q. 47 C Language is a successor to which language ?

A. FORTRAN
B. D Language
C. BASIC
D. B Language

Correct Answer: D. B Language

Q. 48 C is a which level language ?

A. Low Level
B. High Level
C. Low + High
D. None

Correct Answer: B. High Level

Q. 49 Low level language is ?

A. Human readable like language.
B. language with big program size.
C. language with small program size.
D. Difficult to understand and readability is questionable.

Correct Answer: D. Difficult to understand and readability is questionable.

Q. 50 High level language is a ?

A. Human readable like language.
B. language with small program size.
C. language with big program size.
D. language which is difficult to understand and not human readable.

Correct Answer: A. Human readable like language.

Q. 51 C is _______ type of programming language ?

A. Object Oriented
B. Procedural
C. Bit level language
D. Functional

Correct Answer: B. Procedural

Q. 52 Who invented C++ ?

A. Dennis Ritchie
B. Ken Thompson
C. Brian Kernighan
D. Bjarne Stroustrup

Correct Answer: D. Bjarne Stroustrup

Q. 53 Which of the following is used for comments in C++ ?

A. /* comment */
B. // comment */
C. // comment
D. both // comment or /* comment */

Correct Answer: D. both // comment or /* comment */

Q. 54 Which of the following is not a type of Constructor in C++ ?

A. Default constructor
B. Friend constructor
C. Parameterized constructor
D. Copy constructor

Correct Answer: B. Friend constructor

Q. 55 Which of the following type is provided by C++ but not C ?

A. double
B. float
C. bool
D. int

Correct Answer: C. bool

Q. 56 Which of the following correctly declares an array in C++ ?

A. array{10};
B. int array[10];
C. array array[10];
D. int array;

Correct Answer: B. int array[10];

Q. 57 What is Inheritance in C++ ?

A. Deriving new classes from existing classes
B. Overloading of classes
C. Classes with same names
D. Wrapping of data into a single class

Correct Answer: A. Deriving new classes from existing classes

Q. 58 What is meant by a polymorphism in C++ ?

A. class having only single form
B. class having many forms
C. class having four forms
D. class having two forms

Correct Answer: B. class having many forms

Q. 59 What is abstract class in C++ ?

A. Any Class in C++ is an abstract class
B. Class from which any class is derived
C. Class specifically used as a base class with atleast one pure virtual functions
D. Class specifically used as a base class with atleast one virtual functions

Correct Answer: C. Class specifically used as a base class with atleast one pure virtual functions

Q. 60 Which of the following constructors are provided by the C++ compiler if not defined in a class ?

A. Copy constructor
B. Assignment constructor
C. Default constructor
D. All of the mentioned

Correct Answer: C. Default constructor

Q. 61 The operator used for dereferencing or indirection is ____

A. *
B. &
C. ->
D. ->>

Correct Answer: A. *

Q. 62 What will happen in the following C++ code snippet ?
1. int a = 100, b = 200;
2. int *p = &a, *q = &b;
3. p = q;

A. b is assigned to a
B. p now points to b
C. a is assigned to b
D. q now points to a

Correct Answer: B. p now points to b

Q. 63 Which operator is used to signify the namespace ?

A. conditional operator
B. ternary operator
C. scope-resolution operator
D. bitwise operator

Correct Answer: C. scope-resolution operator

Q. 64 What does a class in C++ holds ?

A. data
B. functions
C. both data & functions
D. arrays

Correct Answer: C. both data & functions

Q. 65 Which other keywords are also used to declare the class?

A. class
B. union
C. object
D. struct

Correct Answer: A. class

Q. 66 The data members and functions of a class in C++ are by default ____________

A. protected
B. private
C. public
D. public & protected

Correct Answer: B. private

Q. 67 Constructors are used to ____________

A. initialize the objects
B. delete the objects
C. construct the data members
D. both initialize the objects & construct the data members

Correct Answer: A. initialize the objects

Q. 68 Which of these following members are not accessed by using direct member access operator ?

A. public
B. private
C. protected
D. both private & protected

Correct Answer: D. both private & protected

Q. 69 How many objects can present in a single class ?

A. one
B. two
C. Three
D. as many as possible

Correct Answer: D. as many as possible

Q. 70 Which special character is used to mark the end of class ?

A. ;
B. :
C. #
D. $

Correct Answer: A. ;

Q. 71 Which of the following operators can't be overloaded ?

A. ::
B. -
C. +
D. []

Correct Answer: A. ::

Q. 72 Which keyword is used to represent a friend function ?

A. friend
B. Friend
C. friend_func
D. Friend_func

Correct Answer: A. friend

Q. 73 What is a friend function in C++ ?

A. A function which can access all the private, protected and public members of a class
B. A function which is not allowed to access any member of any class
C. A function which is allowed to access public and protected members of a class
D. A function which is allowed to access only public members of a class

Correct Answer: A. A function which can access all the private, protected and public members of a class

Q. 74 What is a function template ?

A. creating a function without having to specify the exact type
B. creating a function with having an exact type
C. creating a function without class
D. creating a function without having blank spaces

Correct Answer: A. creating a function without having to specify the exact type

Q. 75 What is the syntax of class template ?

A. template <paramaters> class declaration
B. Template <paramaters> class declaration
C. temp <paramaters> class declaration
D. Temp <paramaters> class declaration

Correct Answer: A. template <paramaters> class declaration

Q. 76 What is meant by multiple inheritance ?

A. Deriving a base class from derived class
B. Deriving a derived class from base class
C. Deriving a derived class from more than one base class
D. Deriving a derived base class

Correct Answer: C. Deriving a derived class from more than one base class

Q. 77 Which of the following is the correct syntax to print the message in C++ language ?

A. cout <<"Hello world!";
B. Cout << Hello world! ;
C. Out <<"Hello world!;
D. None of the above

Correct Answer: A. cout <<"Hello world!";

Q. 78 Which of the following is the address operator ?

A. @
B. #
C. &
D. %

Correct Answer: C. &

Q. 79 For inserting a new line in C++ program, which one of the following statements can be used ?

A. \n
B. \r
C. \a
D. None of the above

Correct Answer: A. \n

Q. 80 Which of the following refers to characteristics of an array ?

A. An array is a set of similar data items
B. An array is a set of distinct data items
C. An array can hold different types of datatypes
D. None of the above

Correct Answer: A. An array is a set of similar data items

Q. 81 If we stored five elements or data items in an array, what will be the index address or the index number of the array's last data item ?

A. 3 number
B. 4 number
C. 5 number
D. 88 number

Correct Answer: B. 4 number

Q. 82 Wrapping data and its related functionality into a single entity is known as _____________

A. Abstraction
B. Encapsulation
C. Polymorphism
D. Modularity

Correct Answer: B. Encapsulation

Q. 83 How many types of polymorphism are there in C++ ?

A. 1 types
B. 2 types
C. 3 types
D. 4 types

Correct Answer: B. 2 types

Q. 84 Which of the following is not a type of inheritance ?

A. Multiple
B. Distributive
C. Multilevel
D. Hierarchical

Correct Answer: B. Distributive

Q. 85 Which of the following is called insertion operator ?

A. <<
B. >>
C. >
D. <

Correct Answer: A. <<

Q. 86 Which of the following is called extraction operator ?

A. <<
B. >>
C. >
D. <

Correct Answer: B. >>

Q. 87 What is the size of a boolean variable in C++ ?

A. 1 bit
B. 1 byte
C. 4 bytes
D. 2 bytes

Correct Answer: A. 1 bit

Q. 88 Which of the following is C++ equivalent for scanf() ?

A. cin
B. cout
C. print
D. input

Correct Answer: A. cin

Q. 89 Which of the following is the scope resolution operator ?

A. .
B. *
C. ::
D. ~

Correct Answer: C. ::

Q. 90 What is std in C++ ?

A. std is a standard class in C++
B. std is a standard namespace in C++
C. std is a standard file reading header in C++
D. std is a standard file reading header in C++

Correct Answer: B. std is a standard namespace in C++

Q. 91 Which of the following accesses the seventh element stored in array ?

A. array[6];
B. array[7];
C. array[7];
D. array;

Correct Answer: A. array[6];

Q. 92 What do vectors represent ?

A. Static arrays
B. Dynamic arrays
C. Stack
D. Queue

Correct Answer: B. Dynamic arrays

Q. 93 Where does the execution of c++ program starts ?

A. user-defined() function
B. main() function
C. void() function
D. else() function

Correct Answer: B. main() function

Q. 94 Which of the following correctly declares an array ?

A. int array[10];
B. int array;
C. array{10};
D. array array[10];

Correct Answer: A. int array[10];

Q. 95 Which data type is used to represent the absence of parameters ?

A. int
B. void
C. short
D. float

Correct Answer: B. void

Q. 96 The value 132.54 can be represented using which data type ?

A. float
B. void
C. int
D. bool

Correct Answer: A. float

Q. 97 What is syntax of defining a constructor of class A ?

A. a()
B. ~A()
C. A()
D. ~A();

Correct Answer: C. A()

Q. 98 There are ___ levels of heading in HTML

A. Three
B. Four
C. Five
D. Six

Correct Answer: D. Six

Q. 99 The following html tag is used to display the content as a moving text

A. <marquee>
B. </img>
C. <a href>
D. none of the above

Correct Answer:

Q. 100 html comment should be enclosed between

A.
B. <-- and -->
C. <- and ->
D. none of the above

Correct Answer: A.

Q. 101 _____ tag is used before beginning of the paragraph text

A. <textarea>
B. <sup>
C. <p>
D. <h1>

Correct Answer: C. <p>

Q. 102 Example of picture editing software is

A. ms paint
B. photoshop
C. animator pro
D. none of the above

Correct Answer: B. photoshop

Q. 103 html document have a extension ______

A. .htx or .htxl
B. .htm or .html
C. .hmt or hmtl
D. none of the above

Correct Answer: B. .htm or .html

Q. 104 The _____ element can be used to identify your html file to the outside world

A. title
B. body
C. head
D. html

Correct Answer: D. html

Q. 105 Which of the following is true

A. In tables, header cells are centred by default and the data cells are right-aligned.
B. In the case of character formatting the tag <TW> is used for typewriter-like text
C. Unordered list starts with <UL> and ends with </UL>
D. <SUPR> tag is used for superscripts text

Correct Answer: C. Unordered list starts with <UL> and ends with </UL>

Q. 106 Which of the following is true?

A. BR tag is used to have a blank line
B. In tables, the header cell is centred by default and the data cells are right-aligned
C. The <TR> is used to create a data cell
D. INPUT tag must have at least 4 attributes

Correct Answer: A. BR tag is used to have a blank line

Q. 107 to get the ordered list we use

A. <HI>
B. <UL>
C. <OL>
D. <ML>

Correct Answer: C. <OL>

Q. 108 HTML is the method where ordinary text can be converted into

A. ASCII Text
B. EBCDIC Text
C. IVDSL Text
D. None of the above

Correct Answer: D. None of the above

Q. 109 WWW stands for

A. wide world web
B. web world wide
C. world wide web
D. world web wide

Correct Answer: C. world wide web

Q. 110 The CSS property used to control the element’s font-size is__________

A. text-size
B. text-size
C. text-style
D. None

Correct Answer: D. None

Q. 111 The HTML attribute used to define the internal stylesheet is___________

A. style
B. <style>
C. <link>
D. <script>

Correct Answer: B. <style>

Q. 112 Which of the following CSS property is used to set the background image of an element?

A. background-color
B. background-attachment
C. background-image
D. None

Correct Answer: C. background-image

Q. 113 Which of the following is the correct syntax to display the hyperlinks without any underline?

A. a {decoration : no-underline;}
B. a {text-decoration : underline;}
C. a {text-decoration : none;}
D. None

Correct Answer: C. a {text-decoration : none;}

Q. 114 Which of the following is the correct syntax to make the background-color of all paragraph elements to yellow?

A. all {background-color : yellow;}
B. p {background-color : #yellow;}
C. p {background-color : yellow;}
D. all p {background-color : #yellow;}

Correct Answer: C. p {background-color : yellow;}

Q. 115 Which of the following property is used as the shorthand property for the padding properties?

A. padding-right
B. padding-left
C. padding
D. All of the above

Correct Answer: C. padding

Q. 116 The CSS property used to make the text bold is___________

A. weight :bold
B. font-weight : bold
C. style : bold
D. font : bold

Correct Answer: B. font-weight : bold

Q. 117 The property in CSS used to change the background color of an element is_____________

A. background-color
B. color
C. bgcolor
D. None

Correct Answer: A. background-color

Q. 118 Which of the following is the correct syntax for referring the external style sheet?

A. <style src = “example.css” >
B. <style src = example.css>
C. <stylesheet> example.css</stylesheet>
D. <link rel=“stylesheet” type=“text/css” href=“example.css”>

Correct Answer: D. <link rel=“stylesheet” type=“text/css” href=“example.css”>

Q. 119 The HTML attribute used to define the inline styles is___________

A. class
B. styles
C. style
D. None of the above

Correct Answer: C. style

Q. 120 The CSS property used to draw a line around the elements outside the border?

A. line
B. border
C. padding
D. outline

Correct Answer: D. outline

Q. 121 Which of the following CSS property is used to specify the space between every letter inside an element?

A. character-spacing
B. alpha-spacing
C. letter-spacing
D. alphabet-spacing

Correct Answer: C. letter-spacing

Q. 122 The CSS property used to make the rounded borders, or rounded corners around an element is________

A. border-radius
B. border-collapse
C. border-spacing
D. None

Correct Answer: A. border-radius

Q. 123 The CSS property used to specify the transparency of an element is____________

A. visibility
B. filter
C. overlay
D. opacity

Correct Answer: D. opacity

Q. 124 Which of the following property is used as the shorthand property of margin properties?

A. margin-right
B. margin-left
C. margin
D. None of the above

Correct Answer: C. margin

Q. 125 The CSS property used to set the distance between the borders of the adjacent cells in the table is__________

A. border-collapse
B. border-spacing
C. border-radius
D. None

Correct Answer: B. border-spacing

Q. 126 Are the negative values allowed in padding property?

A. No
B. Yes
C. Can’t say
D. May be

Correct Answer: A. No

Q. 127 What are the valid values of font-style property?

A. italic, bold, bolder
B. normal, bold, italic
C. underline, bold, italic
D. inherit, italic, normal, oblique

Correct Answer: D. inherit, italic, normal, oblique

Q. 128 Which CSS property is used to specify uppercase and lowercase letters in a text?

A. text-transform
B. text-case
C. case
D. text-casing

Correct Answer: A. text-transform

Q. 129 In how many ways can CSS be added to HTML?

A. One
B. Two
C. Three
D. Infinite

Correct Answer: C. Three

Q. 130 Which selector do we use to specify the rule for binding some particular unique element?

A. class
B. tag
C. both tag and class
D. id

Correct Answer: D. id

Q. 131 Internal styles are written within the _____ element.

A. <style>…</style>
B. <css>…</css>
C. <stylesheet>…</stylesheet>
D. Both A. and B.

Correct Answer: A. <style>…</style>

Q. 132 HTML is what type of language ?

A. Scripting Language
B. Markup Language
C. Programming Language
D. Network Protocol

Correct Answer: B. Markup Language

Q. 133 Which HTML tag produces the biggest heading?

A. <h7>
B. <h9>
C. <h4>
D. <h1>

Correct Answer: D. <h1>

Q. 134 Which is correct?

A. <b>Click Here<b>
B. <strong>Click Here<strong>
C. <b>Click Here</b>
D. </strong>Click Here</strong>

Correct Answer: C. <b>Click Here</b>

Q. 135 To create a link to an anchor, you use the______property in A tag.

A. Name
B. Tag
C. Link
D. Href

Correct Answer: D. Href

Q. 136 The page title is inside the____tag.

A. Body
B. Head
C. Division
D. Table

Correct Answer: B. Head

Q. 137 <UL>...</UL> tag is used to ________

A. display the numbered list
B. underline the text
C. display the bulleted list
D. bold the text

Correct Answer: C. display the bulleted list

Q. 138 <TD>...</TD> tag is used to ________

A. Table Heading
B. Table Data
C. Table row
D. none of the above

Correct Answer:

Q. 139 Which tag is used to create body text in HTML?

A. <HEAD>
B. <TEXT>
C. <TITLE>
D. <BODY>

Correct Answer: D. <BODY>

Q. 140 Which plugin is used to cycle through elements, like a slideshow?

A. orbit
B. slideshow
C. scrollspy
D. carousel

Correct Answer: D. carousel

Q. 141 Which plugin is used to create a modal window?

A. modal
B. window
C. dialog Box
D. popup

Correct Answer: A. modal

Q. 142 Which plugin is used to create a tooltip?

A. popup
B. tooltip
C. modal
D. dialog Box

Correct Answer: B. tooltip

Q. 143 Bootstrap�s grid system allows up to

A. 6 columns across the page
B. 12 columns across the page
C. columns across the page
D. columns across the pag

Correct Answer: B. 12 columns across the page

Q. 144 Which class should be used to indicate a button group?

A. btn-group-buttons
B. btn-group
C. btn-grp
D. btn-buttons

Correct Answer: B. btn-group

Q. 145 Which of the following bootstrap styles of buttons can be used to make the size of the button small?

A. .btn-lg
B. .btn-sm
C. .btn-xs
D. .btn-block

Correct Answer: B. .btn-sm

Q. 146 How many Container class are there in Bootstrap?

A. one
B. Two
C. Three
D. Four

Correct Answer: B. Two

Q. 147 The _________ class is used to right-align navigation bar buttons.

A. .navbar-default
B. .navbar-btn
C. .navbar-right
D. .navbar-rgt

Correct Answer: C. .navbar-right

Q. 148 Which class is used to add buttons inside the navigation bar?

A. .navbar-default
B. .navbar-btn
C. .navbar-button
D. .navbar-right

Correct Answer: B. .navbar-btn

Q. 149 Bootstrap is developed by

A. James Gosling
B. Mark Jukervich
C. Mark Otto and Jacob Thornton
D. None of them

Correct Answer: C. Mark Otto and Jacob Thornton

Q. 150 Which of the following bootstrap style is used to add standard links to .navbar?

A. navbar-link
B. link
C. form-link
D. None of the above.

Correct Answer: A. navbar-link

Q. 151 How do you insert a comment in a CSS file?

A. // this is a comment //
B. /* this is a comment */
C. ' this is a comment
D. //this is a comment

Correct Answer: B. /* this is a comment */

Q. 152 How do you change the left margin of an element?

A. margin:
B. indent:
C. margin-left:
D. text-indent:

Correct Answer: C. margin-left:

Q. 153 Interpret this statement: <strong>Michelle</strong>

A. It makes Michelle strong
B. It highlights Michelle as being strong
C. It will print out Michelle in bold font
D. It will print out Michelle in italic font

Correct Answer: C. It will print out Michelle in bold font

Q. 154 What is the tag for an inline frame?

A. Iframe
B. Inframe
C. frame
D. inlineframe

Correct Answer: A. Iframe

Q. 155 Which of the following class in bootstrap is used to create a big box for calling extra attention?

A. .box
B. .container
C. .container-fluid
D. .jumbotron

Correct Answer: D. .jumbotron

Q. 156 Which of the following class in Bootstrap is used to create a basic list group?

A. .grouped-list
B. .select-list
C. .list-group
D. .list-grouped

Correct Answer: C. .list-group

Q. 157 Which of the following class in Bootstrap is used to create basic pagination?

A. .page
B. .pagin
C. .paginate
D. .pagination

Correct Answer: D. .pagination

Q. 158 Which of the following class in Bootstrap is used to create a badge?

A. .tag
B. .badge
C. .page
D. .flag

Correct Answer: B. .badge

Q. 159 The class in Bootstrap which is used to specify the collapsible elements is -

A. .collapse
B. .carousel
C. .pager
D. None of the above

Correct Answer: A. .collapse

Q. 160 Which of the following class in Bootstrap is used for creating the large size modals?

A. .modal-large
B. .modal-sm
C. .modal-big
D. .modal-lg

Correct Answer: D. .modal-lg

Q. 161 Which of the following is correct method to add a success button?

A. <button class = "btn btn-success"> success </button>
B. <button class = "btn button-success">success </button>
C. <button class = "button btn-success">success </button>
D. <button class = "button btn-primary"> success </button>

Correct Answer: A. <button class = "btn btn-success"> success </button>

Q. 162 Which of the following class in Bootstrap is used to create a label?

A. .label
B. .badge
C. .flag
D. .popover

Correct Answer: A. .label

Q. 163 Which of the following is correct about the Bootstrap Grid system?

A. The Bootstrap Grid system allows 12 columns across the page.
B. Bootstrap Grid system is responsive.
C. Both (a) and (b)
D. Neither (a) nor (b)

Correct Answer: C. Both (a) and (b)

Q. 164 Which of the following class in Bootstrap is used to style a table with borders surrounding every element?

A. .table-striped
B. .table-bordered
C. .table-border
D. .table-color

Correct Answer: B. .table-bordered

Q. 165 Which of the following class in Bootstrap is used to style a table with a light gray background to rows when the user moves the cursor over them?

A. .table-striped
B. .table-bordered
C. .table-border
D. .table-hover

Correct Answer: D. .table-hover

Q. 166 In the below code snippet, in what order will the margins be added ? p { margin: 25px 50px 75px 100px; }

A. Top, Right, Bottom, Left,
B. Top, Left, Bottom, Right,
C. Top, Bottom, Right, Left,
D. Right, Left, Top, Bottom,

Correct Answer: A. Top, Right, Bottom, Left,

Q. 167 Which of the following class in Bootstrap is used to provide a responsive fixed width container ?

A. .container-fixed
B. .container-fluid
C. .container
D. All of the above

Correct Answer: C. .container

Q. 168 How can we select an element with a specific ID in CSS ?

A. #
B. .
C. ^
D. None of the above

Correct Answer: A. #

Q. 169 What type of CSS is generally recommended for designing large web pages ?

A. Inline
B. Internal
C. External
D. None of the above

Correct Answer: C. External

Q. 170 What type of CSS is the following code snippet ? <h1 style = "color:blue;" >A Blue Heading </h1>

A. Inline
B. Internal
C. External
D. None of the above

Correct Answer: A. Inline

Q. 171 How many columns are allowed in a bootstrap grid system ?

A. 2 columns
B. 12 columns
C. 3 columns
D. 5 columns

Correct Answer: B. 12 columns

Q. 172 Which HTML tag is used to declare internal CSS ?

A. <style>
B. None of the above
C. <link>
D. <script>

Correct Answer: A. <style>

Q. 173 What are the attributes used to change the size of an image ?

A. Width and height
B. Big and Small
C. Top and bottom
D. None of the above

Correct Answer: A. Width and height

Q. 174 We enclose HTML tags within ?

A. < >
B. { }
C. ! !
D. None of the above

Correct Answer: A. < >

Q. 175 Which of the following tags doesn't require a closing tag ?

A. <br>
B. <hr>
C. Both the <hr> and the <br> tag
D. None of the above

Correct Answer: C. Both the <hr> and the <br> tag

Q. 176 Which property is used to define the font of the element's text?

A. font
B. font-family
C. font-style
D. All of the above

Correct Answer: B. font-family

Q. 177 Which is the correct inline CSS for p tag to define paragrap's text and background colors?

A. <p css="color: red; background-color: yellow;">
B. <p cssstyle="color: red; background-color: yellow;">
C. <p inline="color: red; background-color: yellow;">
D. <p style="color: red; background-color: yellow;">

Correct Answer: D. <p style="color: red; background-color: yellow;">

Q. 178 What does the abbreviation HTML stand for?

A. Hyper Text Markup Language.
B. HighText Markup Language.
C. Hyper Text Markdown Language.
D. None of the above.

Correct Answer: A. Hyper Text Markup Language.

Q. 179 What is the smallest header in HTML by default?

A. h1
B. h4
C. h2
D. h6

Correct Answer: D. h6

Q. 180 What are the types of lists available in HTML?

A. Ordered, Unordered Lists.
B. Bulleted, Numbered Lists.
C. Named, Unnamed Lists.
D. None of the above.

Correct Answer: A. Ordered, Unordered Lists.

Q. 181 HTML files are saved by default with the extension?

A. .html
B. .ht
C. .h
D. None of the above

Correct Answer: A. .html

Q. 182 We enclose HTML tags within?

A. {}
B. <>
C. !!
D. None of the above

Correct Answer: B. <>

Q. 183 What is the effect of the tag?

A. It converts the text within it to bold font.

B. It is used to write black-colored font.

C. It is used to change the font size.

D. None of the above.

Correct Answer: D. None of the above.

Q. 184 Which of the following is correct about HTML?

A. HTML uses User Defined Tags.

B. HTML uses tags defined within the language.

C. Both A and B.

D. None of the above.

Correct Answer: B. HTML uses tags defined within the language.

Q. 185 How to display preformatted text in HTML?

A. <p>

B. <hr>

C. <pre>

D. All of the above

Correct Answer: C. <pre>

Q. 186 What is meant by an empty tag in HTML?

A. There is no such concept of an empty tag in HTML

B. An empty tag does not require a closing tag

C. An empty tag cannot have any content within it

D. None of the above

Correct Answer: B. An empty tag does not require a closing tag

Q. 187 Which attribute is used to provide a unique name to an HTML element?

A. id

B. type

C. class

D. None of the above

Correct Answer: A. id

Q. 188 What is the function of the HTML style attribute?

A. It is used to add styles to an HTML element.

B. It is used to uniquely identify some specific styles of some element.

C. Both A and B.

D. None of the above.

Correct Answer: A. It is used to add styles to an HTML element.

Q. 189 Which of the following is the correct syntax for using the HTML style attribute?

A. <tagname style "property: value;" >

B. <tagname style — "property;" >

C. <tagname style >

D. None of the above

Correct Answer: D. None of the above

Q. 190 Which HTML element is used to define description data?

A. <li>

B. <dl>

C. <ol>

D. <dd>

Correct Answer: D. <dd>

Q. 191 Which of the following properties is used to change the font of text?

A. font-family

B. font-size

C. text-align

D. None of the above

Correct Answer: A. font-family

Q. 192 How are quotations defined in HTML?

A. <quote>

B. <block>

C. <blockquote >

D. None of the above

Correct Answer: C. <blockquote >

Q. 193 What tag is used to render an image on a webpage?

A. img

B. src

C. image

D. None of the above

Correct Answer: A. img

Q. 194 Apart from <i> tag, which of the following tag is used to render a text in italics?

A. <strong>

B. <em>

C. <b>

D. None of the above

Correct Answer: B. <em>

Q. 195 Colors are defined in HTML using?

A. RGB Values

B. HEX Values

C. RGBA values

D. All of the above

Correct Answer: D. All of the above

Q. 196 Which property is used to set colors in HTML?

A. color

B. background-color

C. font-color

D. text-color

Correct Answer: A. color

Q. 197 What are the types of unordered lists in HTML?

A. Circle, square, disc.

B. Triangle, Square, disc.

C. Triangle, Circle, Disc.

D. All of the above.

Correct Answer: A. Circle, square, disc.

Q. 198 Which property is used to set border colors in HTML?

A. border-color

B. border

C. Both A and B

D. None of the above

Correct Answer: A. border-color

Q. 199 Which of the following things are necessary to create an HTML page?

A. A text editor.

B. Web Browser

C. Both A and B

D. None of the above

Correct Answer: C. Both A and B

Q. 200 Which HTML tag is called the root element of an HTML document?

A. <html>

B. <title>

C. <bodY>

D. <head>

Correct Answer: A. <html>

Q. 201 How is black color represented in terms of RGB values?

A. RGB(O, O, 0)

B. RGB(IOO, 100, 100)

C. RGB(IOO, 100, 0)

D. RGB(100, O, 0)

Correct Answer: A. RGB(O, O, 0)

Q. 202 What does the Alpha value in RGBA represent?

A. Opacity value for a color.

B. The shade of a color.

C. Both A and B.

D. None of the above.

Correct Answer: A. Opacity value for a color.

Q. 203 What does the Alpha value of 0.0 represent?

A. Fully Opaque.

B. Fully Transparent.

C. 50% transparent.

D. None of the above.

Correct Answer: B. Fully Transparent.

Q. 204 How to set a font for a whole page?

A. <targetfont>

B. <defaultfont>

C. <font>

D. None of the above

Correct Answer: D. None of the above

Q. 205 Which function is used to open a file in C?

A. open()

B. fopen()

C. file_open()

D. fileopen()

Correct Answer: B. fopen()

Q. 206 Which is the correct syntax to declare a file pointer in C?

A. File *file_pointer;

B. FILE *file_pointer;

C. File file_pointer;

D. FILE file_pointer;

Correct Answer: B. FILE *file_pointer;

Q. 207 Header files ___.

A. Contain function declarations

B. Can be included to a program

C. End with .h extension

D. All of these

Correct Answer: D. All of these

Q. 208 The sqrt() function is used to calculate which value?

A. Square

B. Square of reverse bits

C. Square root

D. None of these

Correct Answer: C. Square root

Q. 209 A recursive function in C ___.

A. Call itself again and again

B. Loop over a parameter

C. Return multiple values

D. None of these

Correct Answer: A. Call itself again and again

Q. 210 Before using a pointer variable, it should be ___.

A. Declared

B. Initialized

C. Both A. and B.

D. None of the above

Correct Answer: C. Both A. and B.

Q. 211 A ___ can be assigned the address of any data type.

A. Dangling pointer

B. Wild pointer

C. Void pointer

D. Null pointer

Correct Answer: C. Void pointer

Q. 212 Before using a pointer variable, it should be ___.

A. Declared

B. Initialized

C. Both A. and B.

D. None of the above

Correct Answer: C. Both A. and B.

Q. 213 Which of the following is the collection of different data types?

A. structure

B. string

C. array

D. All of the above

Correct Answer: A. structure

Q. 214 The size of a union is ___.

A. Sum of sizes of all members

B. Predefined by the compiler

C. Equal to size of largest data type

D. None of these

Correct Answer: C. Equal to size of largest data type

Q. 215 Which feature of OOPS described the reusability of code?

A. Abstraction

B. Encapsulation

C. Polymorphism

D. Inheritance

Correct Answer: D. Inheritance

Q. 216 A single program of OOPS contains _______ classes?

A. Only 1

B. Only 999

C. Only 100

D. Any number

Correct Answer: D. Any number

Q. 217 Which operator from the following can be used to illustrate the feature of polymorphism?

A. Overloading <<

B. Overloading &&

C. Overloading | |

D. Overloading +=

Correct Answer: A. Overloading <<

Q. 218 Which header file is required by the C++ programming language to use the OOPS concept?

A. stdio.h

B. iostream.h

C. stdlib.h

D. We can easily use the OOPS concepts in c++ programs without using any header file

Correct Answer: D. We can easily use the OOPS concepts in c++ programs without using any header file

Q. 219 Which function best describe the concept of polymorphism in programming languages?

A. Class member function

B. Virtual function

C. Inline function

D. Undefined function

Correct Answer: B. Virtual function

Q. 220 Which of the following feature is also known as run-time binding or late binding?

A. Dynamic typing

B. Dynamic loading

C. Dynamic binding

D. Data hiding

Correct Answer: C. Dynamic binding

Q. 221 Which HTML tag is used to set up a Javascript–like client?

A. <script>

B. <select>

C. <anchor>

D. None of the above

Correct Answer: A. <script>

Q. 222 What are the main components of the front end of any working website?

A. HTML, CSS, Javascript.

B. HTML only.

C. Javascript only.

D. Node.js.

Correct Answer: A. HTML, CSS, Javascript.

Q. 223 What is the select tag used for?

A. Creates a combo box.

B. Select some attributes and change their style.

C. Change text font.

D. None of the above.

Correct Answer: A. Creates a combo box.

Q. 224 The most basic part of any HTML page is?

A. ASCII Text

B. Binary Text

C. Text

D. None of the above

Correct Answer: A. ASCII Text

Q. 225 What are those objects called which are used for storing data on the client provided by the HTML local storage?

A. Windows.IocaIStorage

B. Window.sessionStorage

C. Both A and B

D. None of the above

Correct Answer: C. Both A and B

Q. 226 The default value of the BORDER attribute is?

A. 1 pixel

B. 2pixel

C. 4pixel

D. 8pixel

Correct Answer: A. 1 pixel

Q. 227 What are some valid character sets available?

A. UTE-8

B. ANSI

C. ASCII

D. All of the above

Correct Answer: D. All of the above

Q. 228 How many characters can be written in I KB?

A. 1048

B. 1024

C. 1000

D. None of the above

Correct Answer: B. 1024

Q. 229 Which of the following are examples of block–level elements in HTML?

A. <div>

B. <p>

C. <hl>

D. All of the above

Correct Answer: D. All of the above

Q. 230 What are the properties of block-level elements?

A. It always starts on a new line.

B. It always takes the full width available.

C. It has a top and bottom margin.

D. All of the above.

Correct Answer: D. All of the above.

Q. 231 If a background image is smaller than the screen on which it is being displayed, what will occur on the webpage?

A. The blank space will be shown in black.

B. The image will be repeated

C. The image will be stretched

D. The image will not be displayed

Correct Answer: B. The image will be repeated

Q. 232 Which property allows an image link to show a text label?

A. alt

B. str

C. alternative

D. None of the above

Correct Answer: A. alt

Q. 233 What is CSS stands for in Webdesign?

A. Cascading Style Sheets

B. Cascade Style Sheet

C. Color Style Sheets

D. Color Style Sheet

Correct Answer: A. Cascading Style Sheets

Q. 234 What CSS describes?

A. CSS describes how calculation perform on button click.

B. CSS describes how HTML elements are to be displayed on screen, paper, or in other media

C. Both A. and B.

D. None of the above

Correct Answer: B. CSS describes how HTML elements are to be displayed on screen, paper, or in other media

Q. 235 What is a CSS selector?

A. A CSS selector is the CSS class name

B. A CSS selector is the set of properties that are going to be applied on HTML elements

C. A CSS selector is name of CSS file.

D. A CSS selector is the first part of a CSS Rule. It may an HTML element or pattern of elements.

Correct Answer: D. A CSS selector is the first part of a CSS Rule. It may an HTML element or pattern of elements.

Q. 236 In a CSS file, there is a CSS rule for paragraphs tags — what does p can be called?

A. Selector

B. Attribute

C. Property

D. Tag

Correct Answer: A. Selector

Q. 237 Internal styles are written within the element.

A. <style>...</style>

B. <css>...</css>

C. <stylesheet>...</stylesheet>

D. Both A. and B.

Correct Answer: A. <style>...</style>

Q. 238 Inline styles are written within the attribute.

A. style

B. css

C. stylesheet

D. Both A. and B.

Correct Answer: A. style

Q. 239 CSS comments are placed within the

A. //

B. /* and */

C. <* and *>

D. <! and !>

Correct Answer: B. /* and */

Q. 240 Can comments also span multiple lines?

A. Yes

B. No

C. Both A and B

D. None of the above

Correct Answer: A. Yes

Q. 241 Which property is used to define the text color?

A. text-color

B. color

C. font-color

D. Both A. and B.

Correct Answer: B. color

Q. 242 Which property is used to define the background color?

A. background

B. bg-color

C. background-color

D. Both A. and C.

Correct Answer: D. Both A. and C.

Q. 243 From the given options which is/are the valid way to represent a color?

A. A valid color name like "blue"

B. HEX code like "#0000ff"

C. RGB Value rgb(0,0,255)

D. All of the above

Correct Answer: D. All of the above

Q. 244 Which property is used to define the font of the element is text?

A. font

B. font-family

C. font-style

D. All of the above

Correct Answer: B. font-family

Q. 245 To make a text italic, which CSS property is used?

A. font

B. font-family

C. font-style

D. All of the above.

Correct Answer: C. font-style

Q. 246 Why font-weight property is used?

A. Sets how thick or thin characters in text should be displayed.

B. Sets the size of the font

C. Both A. and B.

D. None of the above

Correct Answer: A. Sets how thick or thin characters in text should be displayed.

Q. 247 What is/are the correct value(s) of font-weight property?

A. bold, italic, underline

B. normal, bold, italic

C. normal, bold, bolder, lighter, initial, and inherit

D. None of the above

Correct Answer: C. normal, bold, bolder, lighter, initial, and inherit

Q. 248 What is the correct syntax of border property in CSS?

A. border: border-width border-style border-color

B. border: border-color border-width border-style

C. border: border-style border-width border-color

D. All of the above

Correct Answer: A. border: border-width border-style border-color

Q. 249 Which of the following is the correct syntax to remove the underline on hyperlinks and visited hyperlinks?

A. a {text-decoration : underline;}, a:visited {text-decoration : underline;}

B. a {text-decoration : block;), a:visited {text-decoration : block;}

C. a {text-decoration : none;}, a:visited {text-decoration : none;}

D. None of the above

Correct Answer: C. a {text-decoration : none;}, a:visited {text-decoration : none;}

Q. 250 Which CSS property is used to style the hyperlinks on hover (Mouse over)?

A. a:mouseover

B. a:move

C. a:mover

D. a:hover

Correct Answer: D. a:hover

Q. 251 If you want to use a green dotted border around an image, which CSS property is used for that?

A. border-style

B. border-color

C. border-decoration

D. Both A. and B.

Correct Answer: D. Both A. and B.

Q. 252 Which CSS property and value is used to center an element?

A. text-align:center

B. align:center

C. text-align:middle

D. align:middle

Correct Answer: A. text-align:center

Q. 253 What are the valid values of text-align property?

A. left, middle, right

B. left, center, right

C. left, center, right, justify

D. left, middle, right, justify

Correct Answer: C. left, center, right, justify

Q. 254 What is the use of "text-align:justify" in CSS?

A. Stretches the lines so that each line has equal width

B. Stretches the lines so that each line can be arranged in left alignment

C. Stretches the lines so that each line can be arranged in right alignment

D. None of the above

Correct Answer: A. Stretches the lines so that each line has equal width

Q. 255 Which CSS property is used to specify the indentation of the first line of a text?

A. text-align

B. padding-left

C. text-indent

D. margin-left

Correct Answer: C. text-indent

Q. 256 Which CSS property is used to specify the space between the characters in a text?

A. text-space

B. letter-space

C. letter-spacing

D. letter-distance

Correct Answer: C. letter-spacing

Q. 257 Which CSS property is used to specify the space between lines?

A. line-space

B. line-spacing

C. line-padding

D. line-height

Correct Answer: D. line-height

Q. 258 Which CSS property is used to specify the space between the words in a text?

A. word-spacing

B. word-padding

C. word-height

D. characters-spacing

Correct Answer: A. word-spacing

Q. 259 Which CSS property adds shadow to text?

A. content-shadow

B. text-shadow

C. word-shadow

D. text-outline

Correct Answer: B. text-shadow

Q. 260 Which is the correct CSS statement to capitalize the first letter of each word?

A. text-transform: uppercase

B. text-transform: capitalize

C. text-transform: sentence

D. Both A. and B.

Correct Answer: B. text-transform: capitalize

Q. 261 What are the valid values of text-transform property?

A. uppercase, lowercase, and capitalize

B. uppercase, lowercase, capitalize, and sentence

C. upper, lower, and capital

D. upper, lower, capital, and sentence

Correct Answer: A. uppercase, lowercase, and capitalize

Q. 262 What are the valid values of "text-decoration" property?

A. overline, line-through, underline, and none

B. overline, strike, line-through, underline, and none

C. double-line, overline, line-through, underline, and none

D. None of these

Correct Answer: A. overline, line-through, underline, and none

Q. 263 Which CSS property specifies how to align the last line of a text?

A. text-align

B. last-text-align

C. text-align-last-line

D. text-align-last

Correct Answer: D. text-align-last

Q. 264 Which CSS property sets the vertical alignment of an element?

A. vertical-align

B. vertical-text-align

C. vertical-align-text

D. text-valign

Correct Answer: A. vertical-align

Q. 265 Which CSS property specifies the type of list item marker?

A. list-style

B. list-style-type

C. list-style-square

D. list-style-circle

Correct Answer: B. list-style-type

Q. 266 Which is the correct CSS statement is used to remove the markers/bullets?

A. list-style: none;

B. list-style-type: 0;

C. list-style-type: blank;

D. list-style-type: none;

Correct Answer: D. list-style-type: none;

Q. 267 Which CSS property specifies an image as the list item marker?

A. list-style-image

B. list-style-picture

C. list-style-bgimage

D. list-style-background

Correct Answer: A. list-style-image

Q. 268 Which CSS property specifies if/how an element is displayed?

A. block

B. element-display

C. display

D. element-block

Correct Answer: C. display

Q. 269 HTML elements are positioned by default.

A. static

B. fixed

C. relative

D. none

Correct Answer: A. static

Q. 270 What are the valid values for "position" property?

A. block, none, fixed, absolute, and static

B. block, static, fixed, absolute, and sticky

C. static, relative, fixed, absolute, and none

D. static, relative, fixed, absolute, and sticky

Correct Answer: D. static, relative, fixed, absolute, and sticky

Q. 271 Which CSS property specifies the opacity/transparency of an element?

A. transparency

B. opacity

C. transform-opacity

D. opacity-all

Correct Answer: B. opacity

Q. 272 Which CSS function performs a calculation to be used as the property value?

A. sum()

B. add0

C. calc()

D. addition()

Correct Answer: C. calc()

Q. 273 Which CSS function uses the largest value?

A. large()

B. maximum()

C. max_value()

D. max()

Correct Answer: D. max()

Q. 274 Which CSS function uses the smallest value?

A. small()

B. minimum()

C. min_value()

D. min()

Correct Answer: D. min()

Q. 275 The <style> in Internal CSS refers to

A. Attributes

B. HTML tags

C. Selector

D. All of the above

Correct Answer: B. HTML tags

Q. 276 Can we link multiple stylesheets to a single page?

A. Yes

B. No

C. Cannot say, it depends on CSS properties

D. None of the above

Correct Answer: A. Yes

Q. 277 The CSS property used to change text sizes?

A. font-family

B. font-size

C. font

D. Both A and C

Correct Answer: B. font-size

Q. 278 In this line of code, identify the selector
p {border: 2px solid blue;}

A. p

B. border

C. 2px

D. None of these

Correct Answer: A. p

Q. 279 How many color names does CSS supports?

A. 140 names

B. 75 names

C. 100 names

D. 90 names

Correct Answer: A. 140 names

Q. 280 The property is used in the positioning of the background image.

A. background-image

B. background-position

C. padding

D. All of the above.

Correct Answer: B. background-position

Q. 281 what means 4 times the size of the current font.

A. 4px

B. 4 pt.

C. 4vw

D. 4em

Correct Answer: D. 4em

Q. 282 Amongst the following browsers, which browser supports almost all the CSS properties?

A. Firefox

B. Safari

C. Google Chrome

D. Opera

Correct Answer: C. Google Chrome

Q. 283 What is the CSS Entity for the character "#"?

A. 0023

B. 0026

C. 0027

D. None of the above.

Correct Answer: A. 0023

Q. 284 This selector selects all the elements where the parent is a
element.

A. h + p

B. h > p

C. p.h

D. p > h

Correct Answer: B. h > p

Q. 285 Which selector selects the markers of list items?

A. ::marker

B. .marker

C. ::selector

D. None of these

Correct Answer: A. ::marker

Q. 286 Which is the most widely used font in customizing web pages?

A. Times New Roman

B. Georgia

C. Arial

D. Garamond

Correct Answer: C. Arial

Q. 287 Which of the following CSS properties are animatable?

A. color

B. animation

C. flex

D. All of the above.

Correct Answer: B. animation

Q. 288 We can give space between unit and value when assigning length values to CSS properties.

A. True

B. False

C. Both A and B

D. None of the above.

Correct Answer: B. False

Q. 289 Which of these units of length is supported by Chrome Version 1.0?

A. rem

B. vw

C. px

D. vh

Correct Answer: C. px

Q. 290 Which line of code is a must to write to apply CSS Flexbox properties?

A. display: flex;

B. display: flexbox;

C. display: block;

D. flex-direction: row;

Correct Answer: A. display: flex;

Q. 291 The default value of justify-content property is

A. flex-start

B. flex-end

C. space-between

D. All of the above.

Correct Answer: A. flex-start

Q. 292 Which is the correct syntax for adding animation?

A. animation: name timing-function duration

B. animation: name duration timing-function

C. animation: name delay duration

D. None of the above.

Correct Answer: B. animation: name duration timing-function

Q. 293 Which line of code specifies playing an animation with the same speed from beginning to the end?

A. div {animation- timing function: linear;)

B. div {animation- timing function: ease in;}

C. div {animation- play- state: paused;}

D. div {animation- fill-mode: both;}

Correct Answer: A. div {animation- timing function: linear;)

Q. 294 Which line of code represents a universal selector?

A. *{border: 2px solid red;}

B. both A&B

C. body {border: 2px solid red;}

D. None of these

Correct Answer: A. *{border: 2px solid red;}

Q. 295 Which of the following properties specify the width of the borders?

A. border-width

B. border-style

C. border

D. Both A and C

Correct Answer: D. Both A and C

Q. 296 Is border-image property animatable?

A. Yes

B. No

C. Both A and B.

D. None of these

Correct Answer: B. No

Q. 297 Which cursor property value indicates that the program is busy?

A. help

B. default

C. auto

D. wait

Correct Answer: D. wait

Q. 298 What does this line of code explain? p {display: flex;}

A. All the elements are displayed as a block-level flex container

B. All the elements are not displayed by the browser

C. All the elements are displayed as a grid container

D. All the elements are displayed as an inline flex container

Correct Answer: D. All the elements are displayed as an inline flex container

Q. 299 The text-align property defines the alignment of text in an element.

A. horizontal

B. vertical

C. both horizontal & vertical

D. None of the above

Correct Answer: A. horizontal

Q. 300 Does the z-index property accept negative values?

A. Yes

B. No

C. Both A and B

D. None of the above

Correct Answer: A. Yes

Q. 301 Which CSS property is not supported by the Firefox browser?

A. text-indent

B. scroll- behavior

C. overflow

D. viewport

Correct Answer: D. viewport

Q. 302 Which one is a fallback font?

A. Georgia

B. Times New Roman

C. Serif

D. None of the above.

Correct Answer: C. Serif

Q. 303 Where do we store external stylesheets?

A. CSS files

B. HTML files

C. Folder

D. None of these

Correct Answer: A. CSS files

Q. 304 In the given line of code, identify the type of selector used. #Main {background-color: yellow;}

A. CSS element selector

B. CSS id selector

C. Combinator selector

D. All of the above.

Correct Answer: B. CSS id selector

Q. 305 The Hex Code for the white color is

A. #FFFFFF

B. #FOFOOO

C. #FOOOOF

D. None of the above.

Correct Answer: A. #FFFFFF

Q. 306 In CSS, what does HSL stands for?

A. hue, standard, light

B. height, standard, line-width

C. hue, saturation, lightness

D. hue, standard, line-width

Correct Answer: C. hue, saturation, lightness

Q. 307 Among the following CSS properties, which property is not a shorthand property?

A. background

B. padding

C. display

D. border

Correct Answer: C. display

Q. 308 In this line of code, what is the use of the alt attribute?

A. Adds a text description to an image

B. Provides alternative information for an image

C. To hide an image

D. Both A. and B.

Correct Answer: D. Both A. and B.

Q. 309 The CSS border property specifies the style, color, and of an element border.

A. length

B. width

C. size

D. area

Correct Answer: B. width

Q. 310 What does "padding: 50px 20px;" specifies?

A. top padding is 50px

B. bottom padding is 50px

C. right padding is 20px

D. Both A. and B.

Correct Answer: D. Both A. and B.

Q. 311 What is the default size for normal text, like paragraphs?

A. 11 px

B. 12 px

C. 18 px

D. 16 px

Correct Answer: D. 16 px

Q. 312 What is CSS?

A. CSS is a style sheet language

B. CSS is designed to separate the presentation and content, including layout, colors, and fonts

C. CSS is the language used to style the HTML documents

D. All of the above

Correct Answer: D. All of the above

Q. 313 Which of the following CSS selectors are used to specify a group of elements?

A. tag

B. id

C. class

D. both class and tag

Correct Answer: C. class

Q. 314 Which of the following has introduced text, list, box, margin, border, color, and background properties?

A. HTML

B. PHP

C. css

D. Ajax

Correct Answer: C. css

Q. 315 Which of the following CSS framework is used to create a responsive design?

A. diango

B. rails

C. larawell

D. bootstrap

Correct Answer: D. bootstrap

Q. 316 Which of the following CSS property is used to make the text bold?

A. text-decoration: bold

B. font-weight: bold

C. font-style: bold

D. text-align: bold

Correct Answer: B. font-weight: bold

Q. 317 What will be the output of following CSS code snippet?
hl {color: "greenn ; }

A. nothings happen

B. error occurs

C. all h1 color is green

D. heading becomes green

Correct Answer: A. nothings happen

Q. 318 Which of the following CSS style property is used to specify an italic text?

A. style

B. font

C. font-style

D. @font-face

Correct Answer: C. font-style

Q. 319 What will be the output of following CSS code snippet?

h1 {color: red text-decoration: underline; font-style: italic;}

A. color: red, text-decoration: underline works

B. only font-style: italic works

C. color: red, text-decoration: underline and font-style: italic all works

D. text-decoration: underline and font-style: italic works

Correct Answer: B. only font-style: italic works

Q. 320 Which of the following are the CSS Extension Prefixes for Webkit?

A. -chrome

B. -web

C. -o-

D. -webkit

Correct Answer: D. -webkit

Q. 321 Which of the following function defines a linear gradient as a CSS image?

A. linear-gradient()

B. gradient()

C. grayscale()

D. image()

Correct Answer: A. linear-gradient()

Q. 322 Which of the following is the correct way to apply CSS Styles?

A. in an external CSS file

B. inside an HTML element

C. inside the section of an HTML page

D. All of the above.

Correct Answer: D. All of the above.

Q. 323 Which of the following CSS property sets the font size of text?

A. font-size

B. text-size

C. text

D. size

Correct Answer: A. font-size

Q. 324 Which of the following is not the property of the CSS box model?

A. margin

B. color

C. width

D. height

Correct Answer: B. color

Q. 325 What will be the output of the following CSS code snippet?

span { border: 1px solid red; outline: green dotted thick; }

A. All span elements will have a green thick border and a red outline

B. All span elements will have a red border and a green dotted outline

C. All span elements will have a outer green dotted border and an inner red border

D. All span elements will have an outer red border and inner green dotted border

Correct Answer: C. All span elements will have a outer green dotted border and an inner red border

Q. 326 Which of the following CSS property sets the shadow for a box element?

A. Set-shadow

B. box-shadow

C. shadow

D. canvas-shadow

Correct Answer: B. box-shadow

Q. 327 Which of the following CSS property is used to set the color of the text?

A. text-decoration

B. pallet

C. colour

D. color

Correct Answer: D. color

Q. 328 Which of the following CSS Property controls how an element is positioned?

A. static

B. position

C. fix

D. set

Correct Answer: B. position

Q. 329 Which of the following CSS property is used to specify table borders in CSS?

A. table:border

B. table

C. border

D. none of the mentioned

Correct Answer: C. border

Q. 330 Which CSS Property Sets A Background Image For An Element?

A. Background - Color

B. Background - Image

C. Background - Attachment

D. None of these

Correct Answer: B. Background - Image

Q. 331 What Should Be The Table Width, so That The Width Of A Table Adjust To The Current Width Of The Browser Window?

A. 640 Pixels

B. 100%

C. full-screen

D. 1024 PX

Correct Answer: B. 100%

Q. 332 When We Write <img src="img.png"> What "img.png" Inside Double Quote Implies?

A. Value

B. Element

C. Attribute

D. Operator

Correct Answer: A. Value

Q. 333 The Default Value Of "position" Attribute Is

A. Fixed

B. Absolute

C. Inherit

D. Static

Correct Answer: D. Static

Q. 334 Who invented css?

A. Hakon Wium Lie

B. Tim Berners-Lee

C. Rasmus Lerdorf

D. None of above

Correct Answer: A. Hakon Wium Lie

Q. 335 CSS is written in which language?

A. PHP

B. HTML

C. JAVA

D. python

Correct Answer: B. HTML

Q. 336 What is the latest version of css?

A. css 1

B. css 2

C. css 3

D. css 4

Correct Answer: C. css 3

Q. 337 how will you make all paragraph elements red in color?

A. p {color: red;}

B. p.all {color: red;}

C. all.p {color: #998877;}

D. p.all {color: #990000;}

Correct Answer: A. p {color: red;}

Q. 338 HTML document start and end with which tag pairs?

A. <HEAD > ... </HEAD >

B. <BODY> ... </BODY>

C. <HTML> ... </HTML>

D. <WEB> ... </WEB>

Correct Answer: C. <HTML> ... </HTML>

Q. 339 <TITLE> ... tag must be within _______

A. Title

B. Form

C. Header

D. Body

Correct Answer: C. Header

Q. 340 Text within ... <STRONG> tag is displayed as _____

A. bold

B. italic

C. list

D. indented

Correct Answer: A. bold

Q. 341 Which tag is used to display the numbered list?

A. <OL > ... </OL >

B. <LI > ... </LI >

C. <DL> ... </DL >

D. <EM > ... </EM >

Correct Answer: A. <OL > ... </OL >

Q. 342 <SCRIPT> tag can be placed within____

A. Header

B. Body

C. none of the above

D. both A and B

Correct Answer: D. both A and B

Q. 343 using <P>tag will

A. start a new paragraph

B. break the line

C. end the current paragraph

D. none of the above

Correct Answer: A. start a new paragraph

Q. 344 <TD > tag is used for ________

A. Table heading

B. Table Records and table data

C. Table row

D. None of the above.

Correct Answer: B. Table Records and table data

Q. 345 Which HTML Tag will use to scroll a text in web page?

A. < marquee> ... </marquee >

B. < scroll> ... </scroll>

C. < round> ... </round>

D. < go> ... </go>

Correct Answer: A. < marquee> ... </marquee >

Q. 346 WWW stands for ______.

A. World Wide Weapon

B. World Wide Windows

C. World Wide Web

D. World Wide Writers

Correct Answer: C. World Wide Web

Q. 347 A homepage is __________.

A. an index of encyclopedia articles

B. required for access to the Internet

C. where all Internet data is stored

D. the first page of a website

Correct Answer: D. the first page of a website

Q. 348 ____is a document commonly written in Hyper Text Markup Language (HTML) that is accessible through the Internet or other network using an internet browser.

A. Word

B. Web page

C. Web site

D. Windows

Correct Answer: B. Web page

Q. 349 A web page is located using a _____.

A. Universal Record Linking

B. Uniform Resource Locator

C. Universal Record Locator

D. Uniformly Reachable Links

Correct Answer: B. Uniform Resource Locator

Q. 350 A piece of icon or image on a web page associated with another webpage is called____________.

A. url

B. hyperlink

C. plugin

D. connection

Correct Answer: B. hyperlink

Q. 351 ________ is a collection of web pages.

A. Browser

B. Internet

C. WWW

D. Web site

Correct Answer: D. Web site

Q. 352 What is the correct HTML tag for inserting a line break?

A. < br>

B. <pre >

C. < hr>

D. < td>

Correct Answer: A. < br>

Q. 353 Webpage starts with which of the following tag?

A. <html >

B. <hltm >

C. <htlm >

D. None of these

Correct Answer: A. <html >

Q. 354 JPG sometimes called ________.

A. JPEG

B. JPGG

C. JPEE

D. JJP

Correct Answer: A. JPEG

Q. 355 A webpage displays a picture. What tag was used to display that picture?

A. picture

B. image

C. img

D. src

Correct Answer: C. img

Q. 356 < b>tag makes the enclosed text bold. What is other tag to make text bold?

A. <strong >

B. <dar >

C. < del>

D. < black>

Correct Answer: A. <strong >

Q. 357 Tags and text that are not directly displayed on the page are written in _ section.

A. <head>

B. <body>

C. <html>

D. <title>

Correct Answer: A. <head>

Q. 358 Which tag inserts a line horizontally on your web page?

A. <hr>

B. <br>

C. <b>

D. <del>

Correct Answer: A. <hr>

Q. 359 What should be the first tag in any HTML document?

A. <html>

B. <body>

C. <head>

D. <hmtl>

Correct Answer: A. <html>

Q. 360 Which tag allows you to add a row in a table?

A. <tr> and </tr>

B. <thead> and </thead>

C. <th> and </th>

D. <td> and </td>

Correct Answer: A. <tr> and </tr>

Q. 361 How can you make an e-mail link?

A. <a href="xxx@yyy">

B. <mail="xxx@yyy">

C. <a href="mailto:xxx@yyy">

D. <a hre="xxx@yyy">

Correct Answer: C. <a href="mailto:xxx@yyy">

Q. 362 Choose the correct HTML tag to make a text italic

A. <i>

B. <ii>

C. <u>

D. <ol>

Correct Answer: A. <i>

Q. 363 To create a combo box (drop down box) which tag will you use?

A. <select>

B. <list>

C. <intput type="dropdown">

D. None of the above.

Correct Answer: A. <select>

Q. 364 Which of the following is not a pair tag?

A. <p>

B. <li>

C. <h1>

D. <img>

Correct Answer: D. <img>

Q. 365 To create HTML document you require.

A. web page editing software

B. High powered computer

C. Just a notepad can be used

D. None of these

Correct Answer: C. Just a notepad can be used

Q. 366 The special formatting codes in HTML document used to present content are

A. tags

B. attributes

C. values

D. None of above

Correct Answer: A. tags

Q. 367 HTML documents are saved in

A. Special binary format

B. Machine language codes

C. ASCII text

D. None of above

Correct Answer: C. ASCII text

Q. 368 Some tags enclose the text. Those tags are known as

A. Couple tags

B. Single tags

C. Double tags

D. Pair tags

Correct Answer: D. Pair tags

Q. 369 In HTML document the tags

A. Should be written in upper case

B. should be written in propercase

C. should be written in lower case

D. can be written in both uppercase or lowercase

Correct Answer: D. can be written in both uppercase or lowercase

Q. 370 Marquee is a tag in HTML to

A. mark the list of items to maintaininqueue

B. Mark the text so that it is hidden in browser

C. Display text with scrolling effect

D. None of the above.

Correct Answer: C. Display text with scrolling effect

Q. 371 To create a blank line in your web page

A. press Enter two times

B. press Shift + Enter

C. insert < BR > tag

D. insert < Blank > tag

Correct Answer: C. insert < BR > tag

Q. 372 The way the browser displays the object can be modified by _____

A. attributes

B. parameters

C. modifiers

D. None of these

Correct Answer: A. attributes

Q. 373 Which of the following HTML code is valid?

A. <font colour="red">

B. <font color="red">

C. <redɬ<font>

D. None of the above.

Correct Answer: B. <font color="red">

Q. 374 Which of the following is an attribute related to font tag?

A. fontsize

B. fontface

C. color

D. All of the above

Correct Answer: D. All of the above

Q. 375 HTML supports

A. ordered lists

B. unordered lists

C. does not support those types

D. both type of lists

Correct Answer: D. both type of lists

Q. 376 What tag is used to list individual items of an ordered list?

A. LI

B. OL

C. UL

D. None of these

Correct Answer: A. LI

Q. 377 Which attribute is used withimg tag to display the text if image could not load in browser?

A. description

B. name

C. alt

D. id

Correct Answer: C. alt

Q. 378 Which attribute you’ll use with TD tag to merge two cells horizontally?

A. merge=colspan2

B. rowspan=2

C. colspan=2

D. merge=row2

Correct Answer: C. colspan=2

Q. 379 Which of the following is correct about Bootstrap?

A. Bootst rap is a sleek, intuitive, and powerful, mobile first front-end framework for faster and easier web development.

B. Bootst rap was developed by Mark Otto and Jacob Thornton at Twitter

C. - It uses HTML, CSS and Javascript.

D. All of the above.

Correct Answer: D. All of the above.

Q. 380 Which of the following is correct about Bootstrap?

A. Bootstrap is responsive CSS adjusts to Desktops,Tablets and Mobiles.

B. It contains beautiful and functional built-in components which are easy to customize.

C. - Provides a clean and uniform solution for building an interface for developers.

D. All of the above

Correct Answer: D. All of the above

Q. 381 Which of the following is a part of Mobile First Strategy of Bootstrap?

A. Content: Determine what is most important.

B. Layout: Design to smaller widths first. Base CSS address mobile device first; media queries address for tablet, desktops.

C. Progressive Enhancement: Add elements as screen size increases.

D. All of the above.

Correct Answer: D. All of the above.

Q. 382 Which of the following is correct about Bootstrap Grid System?

A. Rows must be placed within a .container class for proper alignment and padding

B. Use rows to create horizontal groups of columns.

C. Content should be placed within the columns, and only columns may be the immediate children of rows.

D. All of the above

Correct Answer:

Q. 383 Which of the following is correct about Bootstrap Grid System?

A. Predefined grid classes like .row and .col-xs-4 are available for quickly making grid layouts. LESS mixins can also be used for more semantic layouts.

B. Columns create gutters (gaps between column content) via padding. That padding is offset in rows for the first and the last column via negative margin on .rows.

C. Grid columns are created by specifying the number of twelve av

D. All of the above.

Correct Answer: D. All of the above.

Q. 384 Which of the following is correct about Bootstrap Media Query?

A. It simply applies some CSS, based on certain conditions set forth. If those conditions are met, the style is applied.

B. Use rows to create horizontal groups of columns

C. Both of the above.

D. None of the above.

Correct Answer: A. It simply applies some CSS, based on certain conditions set forth. If those conditions are met, the style is applied.

Q. 385 Which of the following is correct about Bootstrap Media Query?

A. Media queries have two parts, a device specification and then a size rule.

B. Media Queries in Bootst rap allow you to move, show and hide content based on the viewport size.

C. Both of the above.

D. None of these

Correct Answer: C. Both of the above.

Q. 386 Which of the following is correct about Bootstrap Mobile First Strategy?

A. You need to add the viewport meta tag to the element, to ensure proper rendering and touch zooming on mobile devices.

B. width property cont rols the width of the device. Setting it to device-width will make sure that it is rendered across various devices (mobiles,desktops,tablets...) properly.

C. initial-scale=1.0 ensures that when loaded, your web page will be rendered at a 1:1 scale, and no zooming will be applied out of the box.

D. All of the above.

Correct Answer: D. All of the above.

Q. 387 Which of the following class styles a table as a nice basic table with just some light padding and horizontal dividers?

A. .table

B. .table-st riped

C. .table-bordered

D. .table-hover

Correct Answer:

Q. 388 Which of the following class styles a table as a nice basic table with stripes on rows?

A. .table

B. .table-striped

C. .table-hover

D. None of the above.

Correct Answer: B. .table-striped

Q. 389 Which of the following class styles a table with borders surrounding every element and rounded corners around the entire table?

A. .table-striped

B. .table

C. .table-bordered

D. None of these

Correct Answer: C. .table-bordered

Q. 390 Which of the following class styles a table with a light gray background to rows while the cursor hovers over them?

A. .table-bordered

B. .table

C. .table-hover

D. None of the above.

Correct Answer: C. .table-hover

Q. 391 Which of the following class applies the hover color to a particular row or cell of a table?

A. .active

B. .success

C. .warning

D. .danger

Correct Answer: A. .active

Q. 392 Which of the following class indicates a successful or positive action?

A. .active

B. .danger

C. .success

D. .warning

Correct Answer: C. .success

Q. 393 Which of the following class indicates a warning that might need attention?

A. .success

B. .active

C. .danger

D. .warning

Correct Answer: D. .warning

Q. 394 Which of the following class indicates a dangerous or potentially negative action?

A. .warning

B. .success

C. .active

D. .danger

Correct Answer: D. .danger

Q. 395 Which of the following class can be used to create a responsive table?

A. .table-responsive

B. .table

C. .table-move

D. .table-danger

Correct Answer: A. .table-responsive

Q. 396 Which of the following class is required to be added to form tag to make it inline?

A. .inline

B. .form-inline

C. .horizontal

D. None of the above.

Correct Answer: B. .form-inline

Q. 397 Which of the following class is required to be added to form tag to make it horizontal?

A. .horizontal

B. .form-horizontal

C. .horizontally

D. None of these

Correct Answer: B. .form-horizontal

Q. 398 Which of the following bootstrap style of button creates a default/ standard button?

A. .btn

B. .btn-success

C. .btn-primary

D. .btn-info

Correct Answer: A. .btn

Q. 399 Which of the following bootstrap style of button provides extra visual weight and identifies the primary action in a set of buttons?

A. .btn

B. .btn-info

C. .btn-success

D. .btn-primary

Correct Answer: D. .btn-primary

Q. 400 Which class adds zebra-stripes to a table?

A. .table-zebra

B. .table-bordered

C. .even and .odd

D. .table-striped

Correct Answer: D. .table-striped

Q. 401 Which class shapes an image to a circle?

A. .img-circle

B. .img-round

C. .rounded-circle

D. .img-rounded

Correct Answer: C. .rounded-circle

Q. 402 Which class is used to create a big box for calling extra attention?

A. .bigbox

B. .jumbotron

C. .jumbo

D. .container

Correct Answer: B. .jumbotron

Q. 403 Which button class is used to create a large button?

A. .btn-lg

B. .btn-xl

C. .btn

D. .btn-large

Correct Answer: A. .btn-lg

Q. 404 Which class is used to create a button group?

A. .btn-group

B. .button-group

C. .group-btn

D. .group-button

Correct Answer: A. .btn-group

Q. 405 Which class is used to create a badge?

A. .badge-item

B. .badge-label

C. .label-badge

D. .badge

Correct Answer: D. .badge

Q. 406 Which class is used to create a loader?

A. .spinner-loader

B. .loader

C. .spinner-border

D. .spinner

Correct Answer: C. .spinner-border

Q. 407 Which class is used to create a basic pagination?

A. .navigation

B. .pages

C. .pagination

D. .page

Correct Answer: C. .pagination

Q. 408 Which class is used to create a basic list group?

A. .group-list

B. .list-group

C. .grouped-list

D. .grouped

Correct Answer: B. .list-group

Q. 409 Which class adds a heading to a card?

A. .card-heading

B. .card-head

C. .card-footer

D. .card-header

Correct Answer: D. .card-header

Q. 410 Which class indicates a dropdown menu?

A. .dropdown-list

B. .dropdown

C. .select

D. None of these

Correct Answer: B. .dropdown

Q. 411 A standard navigation bar is created with:

A. <nav class: "navbar navbar-default">

B. < nav class: "navigationbar navbar-default">

C. <nav navbar">

D. < nav class= "navbar navbar-expand-md " >

Correct Answer: D. < nav class= "navbar navbar-expand-md " >

Q. 412 Which component is used to cycle through elements, like a slideshow?

A. Scrollspy

B. Orbit

C. Carousel

D. Slideshow

Correct Answer: C. Carousel

Q. 413 Which attribute is used to create a tooltip?

A. data-toggle="popup"

B. data-toggle="modal"

C. data-toggle: "collapse"

D. data-toggle="tooltip"

Correct Answer: D. data-toggle="tooltip"

Q. 414 Which contextual class indicates a succesful or positive action?

A. .bg-info

B. .bg-success

C. .bg-primary

D. .bg-warning

Correct Answer: B. .bg-success

Q. 415 Which contextual class indicates a dangerous or potentially negative action?

A. .bg-primary

B. .bg-danger

C. .bg-info

D. .bg-warning

Correct Answer: B. .bg-danger

Q. 416 The Bootstrap grid system has four classes which defines screen size:

A. s, sm, mid, lg

B. xs, sm, md, lg

C. xs, sml, mid, lg

D. x, sm, md, lg

Correct Answer: B. xs, sm, md, lg

Q. 417 Which class is use to display black navigation bar?

A. .nav-pills

B. .navbar-inverse

C. .nav-stacked

D. None of the above

Correct Answer: B. .navbar-inverse

Q. 418 Which class is used to add rounded corners to an image?

A. .img-circle

B. .rounded

C. Both of the above

D. None of the above.

Correct Answer: B. .rounded

Q. 419 Which of the following is true about Jumbotron?

A. A jumbotron is displayed as a grey box with rounded corners.

B. Jumbotron can increase the size of headings and add a lot of margin for landing page content.

C. Both of the above

D. None of these

Correct Answer: C. Both of the above

Q. 420 The bootstrap class md means for

A. phones

B. tablets

C. small laptops

D. laptops and desktops

Correct Answer: C. small laptops

Q. 421 Which class is used to create warning notification alerts in Bootstrap?

A. .alert-danger

B. .alert-warning

C. .alert-info

D. .alert-success

Correct Answer: B. .alert-warning

Q. 422 Which class is used to create a button as a link in bootstrap?

A. .btn-hyperlink

B. .btn-link

C. .btn-url

D. .btn-anchor

Correct Answer: B. .btn-link

Q. 423 Which of the following class is used to create thumbnail image?

A. .img-tmbnail

B. .img-thumb

C. .img-thumbnail-image

D. .img-thumbnail

Correct Answer: D. .img-thumbnail

Q. 424 .img-circle class makes the entire image round by adding border-radius:_________.

A. 50%

B. 100%

C. 45%

D. None of the above.

Correct Answer: A. 50%

Q. 425 The contextual classes that are used to create colored progress bar:

A. .progress-bar-success

B. .progress-bar-info

C. .progress-bar-warning

D. All of the above

Correct Answer: D. All of the above

Q. 426 The .container class provides

A. Full width container

B. Fixed width container

C. Table format

D. To create a Form

Correct Answer: B. Fixed width container

Q. 427 Which class creates pagination?

A. pagination

B. pager

C. pagination-link

D. link-pagination

Correct Answer: A. pagination

Q. 428 Default size of H3 bootstrap heading

A. 18px

B. 30px

C. 26px

D. 24px

Correct Answer: D. 24px

Q. 429 Which class creates list of items?

A. lst-group

B. list-group

C. menu-group

D. list-grp

Correct Answer: B. list-group

Q. 430 Default size of H2 bootstrap heading

A. 20px

B. 24px

C. 30px

D. 36px

Correct Answer: C. 30px

Q. 431 Which is default for a form

A. Horizontal Form

B. Vertical Form

C. Inline Form

D. None of these

Correct Answer: B. Vertical Form

Q. 432 Default size of H1 bootstrap heading

A. 20px

B. 24px

C. 30px

D. 36px

Correct Answer: D. 36px

Q. 433 Default size of H6 bootstrap heading

A. 10px

B. 12px

C. 14px

D. 16px

Correct Answer: B. 12px

Q. 434 The bootstrap class xs means for

A. phones

B. tablets

C. desktop

D. larger desktops

Correct Answer: A. phones

Q. 435 Bootstrap’s global default font-size is

A. 10px

B. 12px

C. 13px

D. 14px

Correct Answer: D. 14px

Q. 436 The Carousel plugin is a component

A. For getting lot of icons

B. For animation

C. For cycling through elements like slideshow

D. None of the above.

Correct Answer: C. For cycling through elements like slideshow

Q. 437 In Bootstrap we can addfor

A. Proper Rendering and Zooming in mobile

B. Make SEO

C. Make proper view of labels

D. None

Correct Answer: A. Proper Rendering and Zooming in mobile

Q. 438 What is latest version of bootstrap?

A. version 2

B. version 4

C. version 3

D. version 5

Correct Answer: D. version 5

Q. 439 Bootstrap is used for

A. Data

B. IoT

C. Bigdata

D. Web applications

Correct Answer: D. Web applications

Q. 440 Which class is used to create a badge danger?

A. .badge-success

B. .badge-warning

C. .badge-dark

D. .badge-danger

Correct Answer: D. .badge-danger

Q. 441 Which class is used to create a pagination?

A. .pagination

B. .page-item

C. .page

D. None of these

Correct Answer: A. .pagination

Q. 442 We use the ___ class to make any element fixed/stay at the top of the page when you scroll past it.

A. .stay-top

B. .fix-top

C. .sticky-top

D. .scroll-top

Correct Answer: C. .sticky-top

Q. 443 The ___ class adds a scrollbar to the table when needed

A. .table-scroll

B. .table-navigate

C. .table-custom

D. .table-responsive

Correct Answer: D. .table-responsive

Q. 444 In list groups, which class is used to highlight the current item?

A. .active

B. .current

C. .ongoing

D. .recent

Correct Answer: A. .active

Q. 445 Which class to create border in bootstrap?

A. .boder

B. .border

C. .boarder

D. None of the above.

Correct Answer: B. .border

Q. 446 In Bootstrap, content must be placed within...

A. Columns

B. row

C. table

D. None of these

Correct Answer: A. Columns

Q. 447 If you want to have 3 equal columns in Bootstrap, which class would you use?

A. .col-md-4

B. .col-md-6

C. .col-md-1

D. .col-md-3

Correct Answer: A. .col-md-4

Q. 448 Is it true that the Bootstrap grid system works across multiple devices?

A. yes

B. no

C. some device

D. None of these

Correct Answer: A. yes

Q. 449 Which of the following is correct method to add a success button.

A. .btn and .btn-success

B. .btn

C. .btn and .btn-warning

D. .btn and .btn-suces

Correct Answer: A. .btn and .btn-success

Q. 450 Which of the following class in Bootstrap is used to create an striped progress bar?

A. .progress-bar-striped

B. .progress-striped

C. .progress-bar-strip

D. None of the above

Correct Answer: A. .progress-bar-striped

Q. 451 Which of the following class in Bootstrap is used for creating the small size modals?

A. .modal-sm

B. .modal-md

C. .modal-lg

D. None of the above

Correct Answer: A. .modal-sm

Q. 452 How do you add shadow to elements in CSS3?

A. box-shadow: 10px 10px 5px grey;

B. shadow-right: 10px shadow-bottom: 10px;

C. shadow-color: grey;

D. alpha-effect[shadow]: 10px 10px 5px grey;

Correct Answer: A. box-shadow: 10px 10px 5px grey;

Q. 453 How can you created rounded corners using CSS3?

A. border[round]: 30px;

B. corner-effect: round;

C. border-radius: 30px;

D. alpha-effect: round-corner;

Correct Answer: C. border-radius: 30px;

Q. 454 How to rotate objects using CSS3?

A. object-rotation: 30deg;

B. transform: rotate(30deg);

C. rotate-object: 30deg;

D. transform: rotate-30deg-clockwise;

Correct Answer: C. rotate-object: 30deg;

Q. 455 How to re-size/scale objects using CSS3?

A. transform: scale(1.5);

B. scale-object: 2,4;

C. scale: (2,4);

D. None

Correct Answer: A. transform: scale(1.5);

Q. 456 __________ is a property that allows developers to add rounded corners on the design elements.

A. Corner

B. Box Shadow

C. Round Corner

D. Border-Radius

Correct Answer: D. Border-Radius

Q. 457 Which of the following is correct method to add a warning button.

A. .btn and .btn-success

B. .btn-btnwarning

C. .btn and .btn-warning

D. None of these

Correct Answer: C. .btn and .btn-warning

Q. 458 Which of the following class in Bootstrap is used to create an progress bar?

A. .progress-bar-striped

B. .progress-bar

C. .progress-bar-success

D. None of these

Correct Answer: B. .progress-bar

Q. 459 If you want to have 4 equal columns in Bootstrap, which class would you use?

A. .col-md-4

B. .col-md-6

C. .col-md-5

D. .col-md-3

Correct Answer: D. .col-md-3

Q. 460 If you want to have 2 equal columns in Bootstrap, which class would you use?

A. .col-md-3

B. .col-md-6

C. .col-md-4

D. .col-md-12

Correct Answer: B. .col-md-6

Q. 461 If you want to have 6 equal columns in Bootstrap, which class would you use?

A. .col-md-2

B. .col-md-4

C. .col-md-3

D. .col-md-6

Correct Answer: A. .col-md-2

Q. 462 Which class is use to fading effect to alert in bootstrap?

A. .fade

B. .show

C. .progress

D. Both A. and B.

Correct Answer: D. Both A. and B.

Q. 463 Which class is use to add slider caption in bootstrap?

A. .carousel-caption

B. .carousel

C. .carousel-link

D. None of these

Correct Answer: A. .carousel-caption

Q. 464 Where in an HTML document is the correct place to refer to an internal style sheet?

A. In the <head> section

B. At the end of the document

C. In the <body> section

D. None of these

Correct Answer: A. In the <head> section

Q. 465 Which HTML attribute is used to define inline styles?

A. class

B. style

C. styles

D. font

Correct Answer: B. style

Q. 466 Which is the correct CSS syntax?

A. body:color=black;

B. {body;color:black;}

C. {body:color=black;}

D. body {color: black;}

Correct Answer: D. body {color: black;}

Q. 467 How do you add a background color for all elements?

A. hl .all {background-color:#FFFFFF;}

B. hl {background-color:#FFFFFF;}

C. all.hl {background-color:#FFFFFF;}

D. None of these

Correct Answer: B. hl {background-color:#FFFFFF;}

Q. 468 Which CSS property is used to change the text color of an element?

A. text-color

B. fgcolor

C. color

D. None of these

Correct Answer: C. color

Q. 469 Which CSS property controls the text size?

A. font-size

B. font-style

C. text-style

D. text-size

Correct Answer: A. font-size

Q. 470 How do you display hyperlinks without an underline?

A. a {decoration:no-underline;}

B. a {text-decoration:none;}

C. a {underline:none;}

D. a {text-decoration:no-underline;}

Correct Answer: B. a {text-decoration:none;}

Q. 471 How do you display a margin like this:
The margin-top = 10 pixels The margin-bottom = 5 pixels The margin-left = 20 pixels The margin-right = 1pixel?

A. margin: 10px 5px 20px 1px;

B. margin: 10px 20px 5px 1px;

C. margin: 10px 1px 5px 20px;

D. margin: 1px 5px 20px 10px;

Correct Answer: C. margin: 10px 1px 5px 20px;

Q. 472 Which property is used to change the left margin of an element?

A. padding-left

B. margin-left

C. indent

D. left

Correct Answer: B. margin-left

Q. 473 When using the padding property; are you allowed to use negative values?

A. Yes

B. No

C. both yes or no

D. None of these

Correct Answer: B. No

Q. 474 How do you make a list type none?

A. list-style-type: none;

B. list-style-type: square;

C. ist-type: none;

D. None of these

Correct Answer: A. list-style-type: none;

Q. 475 How do you select an element with id demo?

A. .demo

B. #demo

C. demo

D. None of these

Correct Answer: B. #demo

Q. 476 How do you select elements with class name test?

A. #test

B. classtest

C. test

D. .test

Correct Answer: D. .test

Q. 477 What is the default value of the position property?

A. absolute

B. static

C. fixed

D. relative

Correct Answer: B. static

Q. 478 Which of the following property specifies the right margin of an element?

A. margin-right

B. margin-left

C. right-margin

D. None of these

Correct Answer: A. margin-right

Q. 479 How do you display the following padding:
The top padding = 10 pixels The bottom padding = 5 pixels The left padding = 20 pixels The right padding = 1pixel

A. padding: 10px 5px 20px 1px;

B. padding: 10px 20px 5px 1px;

C. padding: 5px 20px 10px 1px;

D. padding: 10px 1px 5px 20px;

Correct Answer: D. padding: 10px 1px 5px 20px;

Q. 480 What property and value do we use if we want to align text to the right?

A. text-align: right;

B. text-align: center;

C. text-align: left;

D. None of these

Correct Answer: A. text-align: right;

Q. 481 What property and value do we use if we want to align text to the justify?

A. text-align: right;

B. text-align: left;

C. text-align:center;

D. text-align: justify;

Correct Answer: D. text-align: justify;

Q. 482 Which class adds a text white to a page?

A. .text-white

B. text-light

C. Both A and B

D. None of these

Correct Answer: C. Both A and B

Q. 483 Which class helps a proper dark background in bootstrap?

A. .bg-dark

B. .bg-danger

C. .bg-info

D. .bg-warning

Correct Answer: A. .bg-dark

Q. 484 which class make a spinner in bootstrap?

A. .spinner-loader

B. .spinner-boader

C. .spinner-border

D. None of these

Correct Answer: C. .spinner-border

Q. 485 What does "padding: 50px 0px 20px 0px" specifies?

A. only top and bottom

B. only top

C. top and right

D. All of the above

Correct Answer: A. only top and bottom

Q. 486 Which of the following CSS selectors are used to specify tag elements?

A. .p

B. p

C. #p

D. None of these

Correct Answer: B. p

Q. 487 Which of the following is the property of the CSS box model?

A. background-color

B. color

C. line-height

D. height-width

Correct Answer: D. height-width

Q. 488 Which of the following attribute specifies the URL of the linked resource?

A. src

B. link

C. rel

D. href

Correct Answer: D. href

Q. 489 Which of the following property adds padding to the top of an element?

A. height

B. padding-height

C. padding-top

D. top

Correct Answer: C. padding-top

Q. 490 Which of the following property sets a consistent margin on all four sides of the affected element?

A. border

B. margin

C. padding

D. None of these

Correct Answer: B. margin

Q. 491 Which of the following property sets the background image to scroll or not to scroll with its associated element’s content?

A. background-scroll

B. background-attach

C. background-attachment

D. background-allowance

Correct Answer: C. background-attachment

Q. 492 HTML FULL FORM?

A. HYPER TEXT MARKUP LANGUAGE

B. HYPER MARKUP LANGUAGE

C. HYPER TEXT MARKUP LANG

D. HYPER TEXT MARKUP

Correct Answer: A. HYPER TEXT MARKUP LANGUAGE

Q. 493 Which of the following is used to declare a block-scoped variable in ES6?

A. var

B. let

C. const

D. All of the above

Correct Answer: B. let

Q. 494 What is a primary responsibility of a backend Node.js developer?

A. Designing the user interface

B. Managing server-side logic

C. Writing CSS

D. Creating animations

Correct Answer: B. Managing server-side logic

Q. 495 Which of the following commands is used to install Express.js?

A. npm install express

B. npm install -g express

C. npm get express

D. npm fetch express

Correct Answer: A. npm install express

Q. 496 Which of the following is important for a backend Node.js developer to understand?

A. Database management

B. Frontend frameworks

C. CSS preprocessors

D. Design patterns

Correct Answer: A. Database management

Q. 497 How do you create a new Express application?

A. express()

B. express.create()

C. express.app()

D. express.new()

Correct Answer: A. express()

Q. 498 What is the role of RESTful APIs in backend development?

A. To create dynamic user interfaces

B. To handle client-server communication

C. To manage server hosting

D. To write database queries

Correct Answer: B. To handle client-server communication

Q. 499 Which database is commonly used with Node.js applications?

A. MongoDB

B. MySQL

C. PostgreSQL

D. All of the above

Correct Answer: D. All of the above

Q. 500 Which of the following is used to define a route in Express?

A. app.get()

B. app.post()

C. app.put()

D. All of the above

Correct Answer: D. All of the above

Q. 501 Which of the following is true about arrow functions in ES6?

A. They do not have their own this context.

B. They can be used as constructors.

C. They are not suitable for methods in objects.

D. Both a and c

Correct Answer: D. Both a and c

Q. 502 Which tool is used for version control in Node.js development?

A. Git

B. Docker

C. Jenkins

D. Kubernetes

Correct Answer: A. Git

Q. 503 What is the importance of middleware in Express.js applications?

A. To handle asynchronous tasks

B. To execute code during the request-response cycle

C. To manage frontend routing

D. To compile JavaScript code

Correct Answer: B. To execute code during the request-response cycle

Q. 504 How do you create a template literal in ES6?

A. Using single quotes

B. Using double quotes

C. Using backticks

D. Using curly braces

Correct Answer: C. Using backticks

Q. 505 Which method is used to start an Express server?

A. app.start()

B. app.listen()

C. app.run()

D. app.open()

Correct Answer: B. app.listen()

Q. 506 Which of the following is a key skill for a backend Node.js developer?

A. Proficiency in JavaScript

B. Knowledge of HTML and CSS

C. Understanding of graphic design principles

D. Experience with mobile app development

Correct Answer: A. Proficiency in JavaScript

Q. 507 What is the purpose of using environment variables in Node.js applications?

A. To manage configuration settings

B. To handle HTTP requests

C. To write database queries

D. To style the user interface

Correct Answer: A. To manage configuration settings

Q. 508 What is the default port used by an Express application if no port is specified?

A. port 3000

B. port 8080

C. port 80

D. port 5000

Correct Answer: A. port 3000

Q. 509 Which of the following is a testing framework for Node.js?

A. Mocha

B. Jasmine

C. Jest

D. All of the above

Correct Answer: D. All of the above

Q. 510 How do you serve static files in Express?

A. app.use(express.static(�public�))

B. app.use(�/public�, express.static(�public�))

C. app.get(express.static(�public�))

D. Both a and b

Correct Answer: D. Both a and b

Q. 511 Which feature of ES6 allows you to copy properties from one or more source objects to a target object?

A. Spread operator

B. Object.assign

C. Rest parameter

D. Both a and b

Correct Answer: D. Both a and b

Q. 512 Which middleware is used to parse JSON bodies in Express?

A. bodyParser.json()

B. express.json()

C. bodyParser.urlencoded()

D. express.urlencoded()

Correct Answer: B. express.json()

Q. 513 What is the use of the dotenv package in Node.js?

A. To manage environment variables

B. To connect to databases

C. To create HTTP servers

D. To handle authentication

Correct Answer: A. To manage environment variables

Q. 514 Which of the following is true about default parameters in ES6?

A. They are assigned when a function is declared.

B. They are assigned if no argument is passed or if undefined is passed.

C. They can be changed during the function execution.

D. They must be the first parameter in the function.

Correct Answer: B. They are assigned if no argument is passed or if undefined is passed.

Q. 515 Which of the following is a task runner commonly used in Node.js development?

A. Gulp

B. Grunt

C. npm scripts

D. All of the above

Correct Answer: D. All of the above

Q. 516 Which method is used to handle 404 errors in Express?

A. app.use((req, res, next) => { res.status(404).send(�Not Found�); });

B. app.use((req, res) => { res.status(404).send(�Not Found�); });

C. app.error((req, res) => { res.status(404).send(�Not Found�); });

D. app.get((req, res) => { res.status(404).send(�Not Found�); });

Correct Answer: A. app.use((req, res, next) => { res.status(404).send(�Not Found�); });

Q. 517 How do you secure a Node.js application?

A. Using HTTPS

B. Implementing input validation

C. Using environment variables for sensitive information

D. All of the above

Correct Answer: D. All of the above

Q. 518 What is the output of const x = () => ({ y: 1 }); console.log(x());?

A. Syntax Error

B. undefined

C. { y: 1 }

D. () => { y: 1 }

Correct Answer: C. { y: 1 }

Q. 519 How do you define a route parameter in Express?

A. app.get(�/:id�, (req, res) => { res.send(req.params.id); });

B. app.get(�/id�, (req, res) => { res.send(req.params.id); });

C. app.get(�/id/:id�, (req, res) => { res.send(req.params.id); });

D. app.param(�/:id�, (req, res) => { res.send(req.params.id); });

Correct Answer: A. app.get(�/:id�, (req, res) => { res.send(req.params.id); });

Q. 520 What is the purpose of the helmet middleware in Express.js?

A. To secure HTTP headers

B. To log HTTP requests

C. To parse JSON bodies

D. To manage cookies

Correct Answer: A. To secure HTTP headers

Q. 521 Which of the following allows iteration over the properties of an object?

A. for...of

B. for...in

C. Array.prototype.forEach

D. Object.entries

Correct Answer: B. for...in

Q. 522 Which of the following can be used for API documentation in Node.js?

A. Swagger

B. Postman

C. API Blueprint

D. All of the above

Correct Answer: D. All of the above

Q. 523 Which method is used to handle POST requests in Express?

A. app.get()

B. app.post()

C. app.put()

D. app.delete()

Correct Answer: B. app.post()

Q. 524 What is the importance of unit testing in Node.js development?

A. To ensure code quality and functionality

B. To design the user interface

C. To handle HTTP requests

D. To write CSS

Correct Answer: A. To ensure code quality and functionality

Q. 525 What does the following code output? const foo = �bar�; console.log(${foo} === �bar�);

A. true

B. false

C. undefined

D. Syntax Error

Correct Answer: A. true

Q. 526 How do you redirect a request in Express?

A. res.redirect()

B. res.forward()

C. res.route()

D. es.sendRedirect()

Correct Answer: A. res.redirect()

Q. 527 Which of the following is used to handle authentication in Node.js?

A. Passport

B. JWT

C. OAuth

D. All of the above

Correct Answer: D. All of the above

Q. 528 Which of the following correctly destructures an object in ES6?

A. const { a, b } = { a: 1, b: 2 };

B. const [ a, b ] = { a: 1, b: 2 };

C. const { a, b } = [ 1, 2 ];

D. const ( a, b ) = { a: 1, b: 2 };

Correct Answer: A. const { a, b } = { a: 1, b: 2 };

Q. 529 Which of the following middleware can be used to parse cookies in Express?

A. cookie-parser

B. body-parser

C. express-cookies

D. cookie-handler

Correct Answer: A. cookie-parser

Q. 530 What is the purpose of the pm2 package in Node.js?

A. To manage and monitor Node.js applications

B. To handle HTTP requests

C. To compile JavaScript code

D. To manage database connections

Correct Answer: A. To manage and monitor Node.js applications

Q. 531 How do you set a response header in Express?

A. res.setHeader()

B. res.header()

C. res.headers()

D. res.set()

Correct Answer: D. res.set()

Q. 532 How do you connect to a MongoDB database in a Node.js application?

A. Using the mongodb package

B. Using the mongoose package

C. Using the mongo-client package

D. Both a and b

Correct Answer: D. Both a and b

Q. 533 Which ES6 feature allows you to include expressions in strings?

A. Template literals

B. Spread operator

C. Arrow functions

D. Default parameters

Correct Answer: A. Template literals

Q. 534 Which of the following is a logging library for Node.js?

A. Winston

B. Bunyan

C. Morgan

D. All of the above

Correct Answer: D. All of the above

Q. 535 What is middleware in Express?

A. Functions that handle requests and responses.

B. Functions that are executed after the response is sent.

C. Functions that handle only error requests.

D. Functions that are executed during application initialization.

Correct Answer: A. Functions that handle requests and responses.

Q. 536 What will be the output of console.log([..."hello"]); in ES6?

A. ["h", "e", "l", "l", "o"]

B. ["hello"]

C. "hello"

D. Syntax Error

Correct Answer: A. ["h", "e", "l", "l", "o"]

Q. 537 What is the purpose of the cors middleware in Express.js?

A. To enable Cross-Origin Resource Sharing

B. To parse URL-encoded bodies

C. To handle file uploads

D. To secure HTTP headers

Correct Answer: A. To enable Cross-Origin Resource Sharing

Q. 538 How do you handle errors in Express?

A. app.use((err, req, res, next) => { res.status(500).send(�Server Error�); });

B. app.get((err, req, res, next) => { res.status(500).send(�Server Error�); });

C. app.error((err, req, res, next) => { res.status(500).send(�Server Error�); });

D. app.catch((err, req, res, next) => { res.status(500).send(�Server Error�); });

Correct Answer: A. app.use((err, req, res, next) => { res.status(500).send(�Server Error�); });

Q. 539 How can you export a variable in ES6?

A. export var myVar;

B. module.exports = myVar;

C. export default myVar;

D. exports.myVar = myVar;

Correct Answer: C. export default myVar;

Q. 540 Which of the following is true about the next function in Express middleware?

A. It passes control to the next middleware function.

B. It is used to handle errors.

C. It terminates the request-response cycle.

D. Both a and b

Correct Answer: D. Both a and b

Q. 541 What is the use of the find method in ES6?

A. To find the first element in an array that satisfies a given condition.

B. To find the index of an element in an array.

C. To find all elements in an array that satisfy a given condition.

D. To find the last element in an array.

Correct Answer: A. To find the first element in an array that satisfies a given condition.

Q. 542 How do you handle JSON Web Tokens (JWT) in Express?

A. Using the express-jwt middleware.

B. Using the jsonwebtoken library.

C. Using the jwt-simple library.

D. All of the above

Correct Answer: D. All of the above

Q. 543 Which of the following correctly uses the rest parameter?

A. function sum(...args) { return args.reduce((acc, val) => acc + val, 0); }

B. function sum(args...) { return args.reduce((acc, val) => acc + val, 0); }

C. function sum([args...]) { return args.reduce((acc, val) => acc + val, 0); }

D. function sum(...args[]) { return args.reduce((acc, val) => acc + val, 0); }

Correct Answer: A. function sum(...args) { return args.reduce((acc, val) => acc + val, 0); }

Q. 544 How do you set up a session in Express?

A. Using the express-session middleware.

B. Using the session-handler middleware.

C. Using the express-cookie middleware.

D. Using the session-storage middleware.

Correct Answer: A. Using the express-session middleware.

Q. 545 Which of the following methods is used to merge arrays in ES6?

A. Array.prototype.concat

B. Spread operator

C. Array.prototype.merge

D. Both a and b

Correct Answer: D. Both a and b

Q. 546 Which of the following can be used to handle file uploads in Express?

A. multer

B. body-parser

C. formidable

D. Both a and c

Correct Answer: D. Both a and c

Q. 547 Which of the following keywords is used to define a constant variable in ES6?

A. let

B. const

C. var

D. static

Correct Answer: B. const

Q. 548 What is the use of the res.json method in Express?

A. To send a JSON response.

B. To send a text response.

C. To send an HTML response.

D. To send an XML response.

Correct Answer: A. To send a JSON response.

Q. 549 Which command is used to start the MongoDB server?

A. mongod

B. mongo

C. mongodb

D. mongoserver

Correct Answer: A. mongod

Q. 550 Which method is used to remove whitespace from both ends of a string in ES6?

A. String.prototype.trim

B. String.prototype.strip

C. String.prototype.slice

D. String.prototype.clean

Correct Answer: A. String.prototype.trim

Q. 551 What is the default port number for MongoDB?

A. 27017 number

B. 28017 number

C. 27018 number

D. 28018 number

Correct Answer: A. 27017 number

Q. 552 Which ES6 feature allows you to copy an array without referencing the original array?

A. Array.prototype.slice

B. Spread operator

C. Array.prototype.map

D. Array.prototype.forEach

Correct Answer: B. Spread operator

Q. 553 Which ES6 feature allows defining a property with the same name as the variable?

A. Property Shorthand

B. Destructuring

C. Template literals

D. Arrow functions

Correct Answer: A. Property Shorthand

Q. 554 Which of the following is true about Node.js?

A. It is a server-side framework.

B. It is built on the V8 JavaScript engine.

C. It is primarily used for CPU-intensive applications.

D. It cannot handle asynchronous operations.

Correct Answer: B. It is built on the V8 JavaScript engine.

Q. 555 Which data format is used to store data in MongoDB?

A. XML

B. BSON

C. JSON

D. CSV

Correct Answer: B. BSON

Q. 556 How do you create a new database in MongoDB?

A. use databaseName

B. create database databaseName

C. new database databaseName

D. db.create(databaseName)

Correct Answer: A. use databaseName

Q. 557 Which module in Node.js is used for handling file system operations?

A. fs

B. http

C. path

D. url

Correct Answer: A. fs

Q. 558 Which of the following is a core module in Node.js?

A. express

B. mongodb

C. http

D. lodash

Correct Answer: C. http

Q. 559 How do you insert a document into a collection in MongoDB?

A. db.collection.insertOne(document)

B. db.collection.add(document)

C. db.collection.save(document)

D. db.collection.create(document)

Correct Answer: A. db.collection.insertOne(document)

Q. 560 How do you create a server in Node.js using the http module?

A. http.createServer()

B. http.createClient()

C. http.listen()

D. http.createConnection()

Correct Answer: A. http.createServer()

Q. 561 Which of the following methods is used to find documents in a MongoDB collection?

A. db.collection.find()

B. db.collection.search()

C. db.collection.query()

D. db.collection.get()

Correct Answer: A. db.collection.find()

Q. 562 What does the fs.readFile method do in Node.js?

A. Reads the content of a file asynchronously.

B. Reads the content of a file synchronously.

C. Writes data to a file.

D. Appends data to a file.

Correct Answer: A. Reads the content of a file asynchronously.

Q. 563 How do you update a document in MongoDB?

A. db.collection.updateOne(query, update)

B. db.collection.modify(query, update)

C. db.collection.change(query, update)

D. db.collection.set(query, update)

Correct Answer: A. db.collection.updateOne(query, update)

Q. 564 How do you install a package using npm?

A. npm get

B. npm install

C. npm add

D. npm fetch

Correct Answer: B. npm install

Q. 565 Which of the following is used to delete a document in MongoDB?

A. db.collection.deleteOne(query)

B. db.collection.remove(query)

C. db.collection.drop(query)

D. db.collection.clear(query)

Correct Answer: A. db.collection.deleteOne(query)

Q. 566 What is the command to initialize a new Node.js project?

A. npm init

B. npm start

C. npm new

D. node init

Correct Answer: A. npm init

Q. 567 What is the use of the ObjectId in MongoDB?

A. To uniquely identify documents.

B. To store binary data.

C. To represent a date and time.

D. To create indexes.

Correct Answer: A. To uniquely identify documents.

Q. 568 Which statement is used to import a module in Node.js?

A. require

B. import

C. include

D. use

Correct Answer: A. require

Q. 569 Which method is used to count the number of documents in a MongoDB collection?

A. db.collection.countDocuments()

B. db.collection.count()

C. db.collection.size()

D. db.collection.length()

Correct Answer: A. db.collection.countDocuments()

Q. 570 What is the default file name for the main module in a Node.js project?

A. app.js

B. index.js

C. main.js

D. server.js

Correct Answer: B. index.js

Q. 571 How do you create an index in MongoDB?

A. db.collection.createIndex(keys, options)

B. db.collection.addIndex(keys, options)

C. db.collection.makeIndex(keys, options)

D. db.collection.setIndex(keys, options)

Correct Answer: A. db.collection.createIndex(keys, options)

Q. 572 How can you handle exceptions in Node.js?

A. Using try...catch blocks.

B. Using error events.

C. Using process.on(�uncaughtException�, callback).

D. All of the above

Correct Answer: D. All of the above

Q. 573 Which of the following is used to create a child process in Node.js?

A. child_process.spawn

B. child_process.exec

C. child_process.fork

D. All of the above

Correct Answer: D. All of the above

Q. 574 Which of the following methods is used to aggregate data in MongoDB?

A. db.collection.aggregate(pipeline)

B. db.collection.group(pipeline)

C. db.collection.sum(pipeline)

D. db.collection.collect(pipeline)

Correct Answer: A. db.collection.aggregate(pipeline)

Q. 575 What is the purpose of the package.json file in a Node.js project?

A. To list project dependencies.

B. To define scripts for automation.

C. To set project metadata.

D. All of the above

Correct Answer: D. All of the above

Q. 576 What is the default storage engine for MongoDB?

A. WiredTiger

B. MMAPv1

C. InnoDB

D. RocksDB

Correct Answer: A. WiredTiger

Q. 577 What is the role of the EventEmitter class in Node.js?

A. To handle HTTP requests.

B. To manage file system operations.

C. To facilitate asynchronous event-driven programming.

D. To manage database connections.

Correct Answer: C. To facilitate asynchronous event-driven programming.

Q. 578 Which of the following is true about MongoDB?

A. It is a NoSQL database.

B. It uses a flexible schema.

C. It stores data in collections.

D. All of the above

Correct Answer: D. All of the above

Q. 579 How do you create a replica set in MongoDB?

A. rs.initiate()

B. db.createReplicaSet()

C. mongo --replicaSet

D. db.replicaSet.create()

Correct Answer: A. rs.initiate()

Q. 580 How can you serve static files in Node.js?

A. Using the express.static middleware.

B. Using the http.static method.

C. Using the fs.serveStatic method.

D. Using the path.serve method.

Correct Answer: A. Using the express.static middleware.

Q. 581 Which command is used to backup a MongoDB database?

A. mongodump

B. mongoexport

C. mongobackup

D. mongorestore

Correct Answer: A. mongodump

Q. 582 Which of the following methods can be used to read a directory in Node.js?

A. fs.readDirectory

B. fs.readDir

C. fs.readdir

D. fs.listDir

Correct Answer: C. fs.readdir

Q. 583 How do you restore a MongoDB database from a backup?

A. mongorestore

B. mongorecover

C. mongoload

D. mongobackup

Correct Answer: A. mongorestore

Q. 584 How do you set an environment variable in Node.js?

A. process.setEnv

B. process.env.VAR_NAME = �value�

C. process.setVariable

D. process.variable.VAR_NAME = �value�

Correct Answer: B. process.env.VAR_NAME = �value�

Q. 585 Which of the following is used to monitor MongoDB performance?

A. mongotop

B. mongostat

C. db.serverStatus()

D. All of the above

Correct Answer: D. All of the above

Q. 586 Which of the following methods is used to send a response to the client in a Node.js HTTP server?

A. res.write

B. res.send

C. res.end

D. Both a and c

Correct Answer: D. Both a and c

Q. 587 What is sharding in MongoDB?

A. A method to distribute data across multiple machines.

B. A method to backup data.

C. A method to create indexes.

D. A method to create views.

Correct Answer: A. A method to distribute data across multiple machines.

Q. 588 Which of the following is true about streams in Node.js?

A. Streams are used to handle large amounts of data.

B. Streams are always synchronous.

C. Streams can be readable, writable, or both.

D. Both a and c

Correct Answer: D. Both a and c

Q. 589 How do you check the version of MongoDB?

A. mongo --version

B. mongod --version

C. db.version()

D. All of the above

Correct Answer: D. All of the above

Q. 590 Which module in Node.js can be used to create a WebSocket server?

A. ws

B. websocket

C. net

D. socket

Correct Answer: A. ws

Q. 591 What is the role of the buffer module in Node.js?

A. To handle binary data.

B. To manage HTTP requests.

C. To handle JSON data.

D. To manage child processes.

Correct Answer: A. To handle binary data.

Q. 592 What is React.js?

A. A JavaScript framework

B. A JavaScript library

C. A CSS framework

D. A backend server

Correct Answer: B. A JavaScript library

Q. 593 Who developed React.js?

A. Google

B. Facebook

C. Twitter

D. Microsoft

Correct Answer: B. Facebook

Q. 594 What is a React component?

A. A function or class that optionally accepts inputs and returns a React element

B. A CSS rule

C. A database

D. A type of HTTP request

Correct Answer: A. A function or class that optionally accepts inputs and returns a React element

Q. 595 How do you create a React component using a function?

A. function MyComponent() { return
Hello World
; }

B. function MyComponent { return
Hello World
; }

C. function MyComponent { return "Hello World"; }

D. function MyComponent() {
Hello World
; }

Correct Answer: A. function MyComponent() { return
Hello World
; }

Q. 596 What is JSX?

A. A JavaScript XML

B. A type of HTTP request

C. A CSS preprocessor

D. A database query language

Correct Answer: A. A JavaScript XML

Q. 597 How do you embed JavaScript expressions in JSX?

A. Using double quotes

B. Using curly braces

C. Using square brackets

D. Using parentheses

Correct Answer: B. Using curly braces

Q. 598 What is the purpose of render() in a React component?

A. To define event handlers

B. To describe what the UI should look like

C. To make an HTTP request

D. To update the state

Correct Answer: B. To describe what the UI should look like

Q. 599 Which method in a React class component is used to set initial state?

A. getInitialState

B. componentWillMount

C. constructor

D. render

Correct Answer: C. constructor

Q. 600 How do you handle state in a functional component?

A. Using this.setState

B. Using the useState hook

C. Using the componentWillReceiveProps method

D. Using the state object

Correct Answer: B. Using the useState hook

Q. 601 How can you prevent a component from rendering?

A. Returning false from render()

B. Returning null from render()

C. Using shouldRender method

D. Using this.state = false

Correct Answer: B. Returning null from render()

Q. 602 What is a key in React and why is it important?

A. A unique identifier used to optimize rendering

B. A reference to the parent component

C. A way to handle events

D. A method to fetch data

Correct Answer: A. A unique identifier used to optimize rendering

Q. 603 Which lifecycle method is called after the component is rendered for the first time?

A. componentWillUnmount

B. componentDidUpdate

C. componentDidMount

D. componentWillUpdate

Correct Answer: C. componentDidMount

Q. 604 How do you pass a method from a parent component to a child component?

A. As a prop

B. As a state

C. Using this.bind

D. Using useEffect

Correct Answer: A. As a prop

Q. 605 Which hook is used to perform side effects in functional components?

A. useContext

B. useEffect

C. useState

D. useReducer

Correct Answer: B. useEffect

Q. 606 Which of the following methods is used to update state in a class component?

A. updateState

B. setState

C. changeState

D. modifyState

Correct Answer: B. setState

Q. 607 What is the purpose of the useEffect hook in React?

A. To handle state updates

B. To fetch data or run side effects

C. To create a reference to a DOM element

D. To manage component lifecycle

Correct Answer: B. To fetch data or run side effects

Q. 608 How can you conditionally apply a class to a React element?

A. Using if statements inside render

B. Using ternary operators inside className

C. Using a switch statement inside className

D. Using setState to change the class

Correct Answer: B. Using ternary operators inside className

Q. 609 Which method is used to remove a component from the DOM?

A. componentDidMount

B. componentWillUnmount

C. componentDidUpdate

D. componentWillReceiveProps

Correct Answer: B. componentWillUnmount

Q. 610 What is the virtual DOM in React?

A. A copy of the real DOM that is kept in memory and synced with the real DOM

B. A browser API for managing elements

C. A tool for debugging React components

D. A feature for optimizing CSS

Correct Answer: A. A copy of the real DOM that is kept in memory and synced with the real DOM

Q. 611 How can you lift state up in React?

A. By using higher-order components

B. By moving state to a common ancestor component

C. By using context

D. By using Redux

Correct Answer: B. By moving state to a common ancestor component

Q. 612 What is a pure component in React?

A. A component that never re-renders

B. A component that only re-renders when its props or state change

C. A component that handles side effects

D. A component that is always functional

Correct Answer: B. A component that only re-renders when its props or state change

Q. 613 Which of the following can be used to share logic across React components?

A. Mixins

B. Render props

C. Context

D. All of the above

Correct Answer: D. All of the above

Q. 614 What does ReactDOM.render() do?

A. It updates the state of a component

B. It compiles JSX into JavaScript

C. It renders a React element into the DOM

D. It creates a virtual DOM

Correct Answer: C. It renders a React element into the DOM

Q. 615 Which React hook should you use for managing form inputs?

A. useReducer

B. useEffect

C. useState

D. useContext

Correct Answer: C. useState

Q. 616 What is a higher-order component (HOC) in React?

A. A component that manages state

B. A function that takes a component and returns a new component

C. A method to fetch data from APIs

D. A component that uses hooks

Correct Answer: B. A function that takes a component and returns a new component

Q. 617 What is the correct way to handle events in React?

A. Using the on prefix followed by the event name

B. Using the addEventListener method

C. Using inline JavaScript code

D. Using data attributes

Correct Answer: A. Using the on prefix followed by the event name

Q. 618 Which of the following is a controlled component in React?

A. A component that controls its own state

B. A component that receives its current value as a prop and notifies changes via callbacks

C. A component that is not affected by state changes

D. A component that uses refs to access the DOM

Correct Answer: B. A component that receives its current value as a prop and notifies changes via callbacks

Q. 619 What is the purpose of React.Fragment?

A. To create a wrapper element in the DOM

B. To avoid adding extra nodes to the DOM

C. To render multiple components conditionally

D. To handle form submissions

Correct Answer: B. To avoid adding extra nodes to the DOM

Q. 620 How can you memoize a component to prevent unnecessary re-renders?

A. By using React.memo

B. By using useEffect

C. By using useCallback

D. By using useState

Correct Answer: A. By using React.memo

Q. 621 What is the use of prop-types in React?

A. To optimize component performance

B. To document the intended types of properties passed to components

C. To manage state in components

D. To create context in a React application

Correct Answer: B. To document the intended types of properties passed to components

Q. 622 What is context in React?

A. A way to pass data through the component tree without having to pass props down manually at every level

B. A state management tool

C. A method to create side effects

D. A lifecycle method

Correct Answer: A. A way to pass data through the component tree without having to pass props down manually at every level

Q. 623 What does the useContext hook do?

A. It manages component side effects

B. It allows a functional component to access context

C. It triggers a re-render

D. It replaces useState

Correct Answer: B. It allows a functional component to access context

Q. 624 What is the significance of keys in lists in React?

A. They determine the order of elements in the DOM

B. They help identify which items have changed, are added, or removed

C. They are used to style list items

D. They are required to use map function

Correct Answer: B. They help identify which items have changed, are added, or removed

Q. 625 What is a stateful component in React?

A. A component that manages its own state

B. A component that only receives props

C. A component that uses hooks

D. A component that does not re-render

Correct Answer: A. A component that manages its own state

Q. 626 Which of the following hooks is used to create a mutable object that persists for the lifetime of the component?

A. useState

B. useEffect

C. useRef

D. useReducer

Correct Answer: C. useRef

Q. 627 How do you create a context in React?

A. const MyContext = createContext();

B. const MyContext = new Context();

C. const MyContext = useContext();

D. const MyContext = useCreateContext();

Correct Answer: A. const MyContext = createContext();

Q. 628 What does the useReducer hook do?

A. It manages state with a reducer function

B. It replaces the useState hook

C. It performs side effects in functional components

D. It creates a context

Correct Answer: A. It manages state with a reducer function

Q. 629 What is the purpose of React.StrictMode?

A. To enforce strict typing

B. To highlight potential problems in an application

C. To manage state

D. To optimize performance

Correct Answer: B. To highlight potential problems in an application

Q. 630 Which method would you use to update the state of a component after an asynchronous operation?

A. this.setState

B. this.forceUpdate

C. this.updateState

D. this.modifyState

Correct Answer: A. this.setState

Q. 631 How do you access props in a class component?

A. this.properties

B. this.args

C. this.state

D. this.props

Correct Answer: D. this.props

Q. 632 What does the shouldComponentUpdate lifecycle method do?

A. It forces a component to update

B. It determines if a component should re-render

C. It is used to fetch data from an API

D. It binds event handlers

Correct Answer: B. It determines if a component should re-render

Q. 633 Which of the following is NOT a feature of React Router?

A. Route nesting

B. Code splitting

C. Lazy loading

D. Automatic state management

Correct Answer: D. Automatic state management

Q. 634 What is the purpose of the useLayoutEffect hook?

A. To perform side effects in a synchronous manner

B. To handle state updates

C. To replace useEffect

D. To manage context

Correct Answer: A. To perform side effects in a synchronous manner

Q. 635 How do you define default props for a component?

A. Component.defaultProps = { ... }

B. Component.props = { ... }

C. Component.default = { ... }

D. Component.defaultProperties = { ... }

Correct Answer: A. Component.defaultProps = { ... }

Q. 636 What is the primary purpose of the React.Children utility?

A. To validate child components

B. To manage state in child components

C. To provide utilities for dealing with the this.props.children opaque data structure

D. To style child components

Correct Answer: C. To provide utilities for dealing with the this.props.children opaque data structure

Q. 637 What is the difference between useEffect and useLayoutEffect?

A. useEffect runs after the DOM updates, useLayoutEffect runs synchronously after all DOM mutations

B. useLayoutEffect runs after the DOM updates, useEffect runs synchronously after all DOM mutations

C. useEffect is used for context management, useLayoutEffect is used for state management

D. There is no difference

Correct Answer: A. useEffect runs after the DOM updates, useLayoutEffect runs synchronously after all DOM mutations

Q. 638 Which of the following is true about React keys?

A. They should be unique among sibling elements

B. They are required for all elements in React

C. They should be generated randomly each time the component renders

D. They are used to store state in React

Correct Answer: A. They should be unique among sibling elements

Q. 639 What is the purpose of the memo function in React?

A. To memoize the results of expensive calculations

B. To create context

C. To prevent unnecessary re-renders of functional components

D. To manage state

Correct Answer: C. To prevent unnecessary re-renders of functional components

Q. 640 What does the createRef function do in React?

A. It creates a reference to a DOM element or class component instance

B. It manages state updates

C. It fetches data from APIs

D. It creates context

Correct Answer: A. It creates a reference to a DOM element or class component instance

Q. 641 What is the purpose of the useMemo hook in React?

A. To memoize a function

B. To memoize a value

C. To manage state

D. To handle side effects

Correct Answer: B. To memoize a value

Q. 642 How can you pass multiple children to a React component?

A. Using an array of elements

B. Using React.Fragment or <>...

C. Using children prop

D. All of the above

Correct Answer: D. All of the above

Q. 643 What is the purpose of the ErrorBoundary component in React?

A. To handle JavaScript errors in a part of the component tree

B. To manage component state

C. To perform side effects

D. To validate props

Correct Answer: A. To handle JavaScript errors in a part of the component tree

Q. 644 Which hook is used to optimize performance by preventing re-renders in functional components?

A. useEffect

B. useState

C. useMemo

D. useRef

Correct Answer: C. useMemo

Q. 645 How do you force a component to re-render?

A. this.setState()

B. this.forceUpdate()

C. this.updateComponent()

D. this.renderAgain()

Correct Answer: B. this.forceUpdate()

Q. 646 What is the primary use of the useRef hook in functional components?

A. To directly manipulate the DOM.

B. To manage state.

C. To perform side effects.

D. To manage props.

Correct Answer: A. To directly manipulate the DOM.

Q. 647 Which lifecycle method is invoked just before a component is removed from the DOM?

A. componentDidMount

B. componentWillUnmount

C. componentDidUpdate

D. componentWillUpdate

Correct Answer: B. componentWillUnmount

Q. 648 What does props.children contain?

A. The properties passed to a component.

B. The state of the component.

C. The nested elements within a component.

D. The methods of a component.

Correct Answer: C. The nested elements within a component.

Q. 649 How can you handle forms in React?

A. By directly manipulating the DOM.

B. By using controlled components.

C. By using uncontrolled components.

D. Both b and c.

Correct Answer: D. Both b and c.

Q. 650 What does the useImperativeHandle hook do?

A. It customizes the instance value that is exposed when using ref in functional components.

B. It manages state.

C. It performs side effects.

D. It sets up subscriptions.

Correct Answer: A. It customizes the instance value that is exposed when using ref in functional components.

Q. 651 Which hook can be used to optimize the rendering of large lists?

A. useEffect

B. useState

C. useMemo

D. useCallback

Correct Answer: C. useMemo

Q. 652 What is the purpose of the default keyword when exporting a React component?

A. It exports a component that can be imported with any name.

B. It exports a component with the same name.

C. It allows multiple components to be exported.

D. It exports a component as a class.

Correct Answer: A. It exports a component that can be imported with any name.

Q. 653 How do you handle side effects in React components?

A. Using useState

B. Using useEffect

C. Using useMemo

D. Using useReducer

Correct Answer: B. Using useEffect

Q. 654 What is the purpose of the key prop in React lists?

A. To style list items.

B. To uniquely identify elements and optimize rendering.

C. To bind event handlers.

D. To manage state.

Correct Answer: B. To uniquely identify elements and optimize rendering.

Q. 655 Which of the following methods can be used to set up a timer in React?

A. setTimeout

B. useTimer

C. createTimer

D. setInterval

Correct Answer: A. setTimeout

Q. 656 What is the main advantage of using React.PureComponent?

A. It ensures the component always re-renders.

B. It optimizes the component by performing a shallow comparison of props and state.

C. It allows the component to manage its own state.

D. It enables the component to handle side effects.

Correct Answer: B. It optimizes the component by performing a shallow comparison of props and state.

Q. 657 How do you access lifecycle methods in a functional component?

A. Using class syntax.

B. Using hooks like useEffect.

C. Using this keyword.

D. Using higher-order components.

Correct Answer: B. Using hooks like useEffect.

Q. 658 What is the role of ReactDOM in a React application?

A. It provides methods to manage state.

B. It handles rendering of React components in the DOM.

C. It manages component lifecycle.

D. It performs side effects.

Correct Answer: B. It handles rendering of React components in the DOM.

Q. 659 Which method is used to create an element in React?

A. React.createElement

B. React.makeElement

C. React.buildElement

D. React.generateElement

Correct Answer: A. React.createElement

Q. 660 What does the useReducer hook return?

A. An array containing the current state and a dispatch function.

B. An object containing the current state and a dispatch function.

C. A function to update the state.

D. An array containing the current state and a state updater function.

Correct Answer: A. An array containing the current state and a dispatch function.

Q. 661 What is the difference between a controlled and uncontrolled component in React?

A. Controlled components manage their own state, uncontrolled components use refs.

B. Controlled components use refs, uncontrolled components manage their own state.

C. Controlled components are stateless, uncontrolled components are stateful.

D. Controlled components use props, uncontrolled components do not.

Correct Answer: A. Controlled components manage their own state, uncontrolled components use refs.

Q. 662 What is a React Portal?

A. A way to render children into a different part of the DOM tree.

B. A method to manage state.

C. A lifecycle method.

D. A way to handle side effects.

Correct Answer: A. A way to render children into a different part of the DOM tree.

Q. 663 How do you handle errors in React components?

A. Using try and catch blocks.

B. Using ErrorBoundary components.

C. Using componentDidCatch lifecycle method.

D. Both b and c.

Correct Answer: D. Both b and c.

Q. 664 How can you optimize the performance of a React application?

A. Using keys in lists.

B. Using React.memo.

C. Using useMemo and useCallback.

D. All of the above.

Correct Answer: D. All of the above.

Q. 665 Which of the following is used to handle routing in a React application?

A. React Route

B. Redux

C. Context API

D. MobX

Correct Answer: A. React Route

Q. 666 What does the useState hook return?

A. The current state and a function to update it.

B. The current state and a reducer function.

C. A function to fetch data and a function to set data.

D. The initial state and a function to reset it.

Correct Answer: A. The current state and a function to update it.

Q. 667 What is the purpose of the contextType property in class components?

A. To define the type of context

B. To set default props

C. To consume context in a class component

D. To manage state

Correct Answer: C. To consume context in a class component

Q. 668 Which of the following hooks can be used to perform side effects in a functional component?

A. useEffect

B. useState

C. useRef

D. useReducer

Correct Answer: A. useEffect

Q. 669 What does the useTransition hook do?

A. It manages component transitions.

B. It provides a way to track the completion of a state update

C. It defers state updates to improve performance.

D. It handles side effects.

Correct Answer: C. It defers state updates to improve performance.

Q. 670 What is the purpose of ReactDOM.createPortal?

A. To create a new DOM element

B. To render children into a different part of the DOM tree

C. To manage state

D. To handle form submissions

Correct Answer: B. To render children into a different part of the DOM tree

Q. 671 How do you pass a method as a prop to a child component?

A. By calling the method in the child component

B. By using the bind method

C. By passing it directly as a prop

D. By using useState

Correct Answer: C. By passing it directly as a prop

Q. 672 Which hook is used to perform a cleanup function in React?

A. useState

B. useReducer

C. useEffect

D. useCallback

Correct Answer: C. useEffect

Q. 673 How do you ensure that a function is only recreated when its dependencies change?

A. By using useEffect

B. By using useMemo

C. By using useCallback

D. By using useState

Correct Answer: C. By using useCallback

Q. 674 Which of the following methods can be used to create a context in React?

A. React.createContext

B. React.useContext

C. React.Context

D. React.create

Correct Answer: A. React.createContext

Q. 675 What is the primary purpose of React.lazy?

A. To perform side effects lazily

B. To load components lazily for code splitting

C. To manage state

D. To handle routing

Correct Answer: B. To load components lazily for code splitting

Q. 676 Which of the following lifecycle methods is invoked just before a component is removed from the DOM?

A. componentDidMount

B. componentDidUpdate

C. componentWillUnmount

D. getSnapshotBeforeUpdate

Correct Answer: C. componentWillUnmount

Q. 677 In the context of React Hooks, what will happen if you call the same Hook multiple times in a single component?

A. React will throw an error.

B. The last Hook call will override the previous ones.

C. Each Hook call is independent and maintains its own state.

D. Hooks can only be called once per component.

Correct Answer: C. Each Hook call is independent and maintains its own state.

Q. 678 When using React Context, how can you optimize a component to avoid unnecessary re-renders when context values change?

A. Use React.memo to wrap the component.

B. Use shouldComponentUpdate to compare props and state.

C. Use useCallback for any functions passed as context values.

D. All of the above.

Correct Answer: D. All of the above.

Q. 679 Which of the following is NOT a valid way to handle side effects in a functional component using React Hooks?

A. useEffect

B. useLayoutEffect

C. useReducer

D. useCallback

Correct Answer: D. useCallback

Q. 680 Which of the following is true about using useReducer over useState?

A. useReducer is better suited for managing complex state logic.

B. useReducer can only be used in class components.

C. useReducer always improves performance over useState.

D. useReducer requires a middleware to function.

Correct Answer: A. useReducer is better suited for managing complex state logic.

Q. 681 Which of the following lifecycle methods is invoked immediately after a component is mounted in React?

A. componentWillMount

B. componentDidMount

C. componentWillUpdate

D. componentDidUpdate

Correct Answer: A. componentWillMount

Q. 682 Which hook can be used to emulate the behavior of componentDidCatch in functional components to handle errors in React?

A. useEffect

B. useErrorBoundary

C. useError

D. React does not currently provide a built-in hook for error handling in functional components.

Correct Answer: D. React does not currently provide a built-in hook for error handling in functional components.

Q. 683 In React, what is the primary purpose of using the key prop when rendering a list of elements?

A. To ensure uniqueness of elements within the list.

B. To specify the order of elements in the list.

C. To provide a reference to access elements within the list

D. To determine the styling of elements in the list.

Correct Answer: A. To ensure uniqueness of elements within the list.

Q. 684 How do you import a CSS file in a React component?

A. import styles from './styles.css';

B. import { styles } from './styles.css';

C. import './styles.css';

D. require('./styles.css');

Correct Answer: C. import './styles.css';

Q. 685 Which of the following is true about React's reconciliation process?

A. It always updates the entire DOM tree.

B. It updates only the parts of the DOM that have changed.

C. It bypasses the virtual DOM.

D. It is performed manually by the developer.

Correct Answer: B. It updates only the parts of the DOM that have changed.

Q. 686 What is the purpose of the useCallback hook in React?

A. To create a callback function that doesn't change unless its dependencies change.

B. To fetch data from an API.

C. To create a mutable reference object.

D. To manage state.

Correct Answer: A. To create a callback function that doesn't change unless its dependencies change.

Q. 687 How does the React.memo higher-order component (HOC) help improve performance?

A. It prevents the component from updating unless its props have changed.

B. It memoizes the component's state.

C. It keeps a reference to the component to avoid re-creation.

D. It ensures the component is always re-rendered when its parent updates.

Correct Answer: A. It prevents the component from updating unless its props have changed.

Q. 688 How can you prevent a function component from re-rendering in React when its props haven't changed?

A. Use React.memo to wrap the component.

B. Use PureComponent instead of a function component.

C. Use the useEffect hook to compare props.

D. Use the shouldComponentUpdate method.

Correct Answer: A. Use React.memo to wrap the component.

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Correct Answer: A. The opening parenthesis should immediately follow the macro name.

Correct Answer: C. Analyzing tool

Correct Answer: B. The current value of a

Correct Answer: A. It reduces execution time.

Correct Answer: C. Anywhere, but starting on a new line.

Correct Answer: D. 1008

Correct Answer: D. do while

Correct Answer: C. 20 char

Correct Answer: A. Pre-processor

Correct Answer: C. 2 or 4 bytes

Correct Answer: B. 39 characters

Correct Answer: B. Balance is a pointer to a pointer to an integer

Correct Answer: B. A pointer must point to a data item on the heap (free store).

Correct Answer: C. 2004 value

Correct Answer: A. p1 = p1 + p2;

Correct Answer: A. value 305

Correct Answer: B. int my_num = 100000;

Correct Answer: C. Dennis Ritchie

Correct Answer: A. LowerCase letters

Correct Answer: C. Variable names cannot start with a digit

Correct Answer: A. volatile

Correct Answer: A. String str;

Correct Answer: C. const

Correct Answer: B. 0 or 1

Correct Answer: D. None of the mentioned

Correct Answer: D. all of the mentioned

Correct Answer: A. true

Correct Answer: B. External

Correct Answer: C. static static int a; //a static variable prefixed with static

Correct Answer: C. Conditional compilation

Correct Answer: A. Preprocessor directive

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Correct Answer: A. #

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Correct Answer: C. stdio. h

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Correct Answer: A. Human readable like language.

Correct Answer: B. Procedural

Correct Answer: D. Bjarne Stroustrup

Correct Answer: D. both // comment or /* comment */

Correct Answer: B. Friend constructor

Correct Answer: C. bool

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Correct Answer: A. Deriving new classes from existing classes

Correct Answer: B. class having many forms

Correct Answer: C. Class specifically used as a base class with atleast one pure virtual functions

Correct Answer: C. Default constructor

Correct Answer: A. *

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Correct Answer: C. scope-resolution operator

Correct Answer: C. both data & functions

Correct Answer: A. class

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Correct Answer: A. initialize the objects

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