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WEB DESIGN Quiz

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Quiz
Q. 1   There are ___ levels of heading in HTML

Six

Q. 2   To get the ordered list we use

<ol>

Q. 3   Which one of the following tags is used to insert graphics in the webpage

<img>

Q. 4   The following html tag is used to display the content as a moving text

<marquee>

Q. 5   html comment should be enclosed between

<!– and — >

Q. 6   _____ tag is used before beginning of the paragraph text

<p>

Q. 7   Example of picture editing software is

photoshop

Q. 8   html document have a extension ______

.htm or .html

Q. 9   The _____ element can be used to identify your html file to the outside world

html

Q. 10   Which of the following is true

Unordered list starts with <UL> and ends with </UL>

Q. 11   Which of the following is true?

BR tag is used to have a blank line

Q. 12   to get the ordered list we use

<OL>

Q. 13   HTML is the method where ordinary text can be converted into

None of the above

Q. 14   WWW stands for

world wide web

Q. 15   The CSS property used to control the element’s font-size is__________

None

Q. 16   The HTML attribute used to define the internal stylesheet is___________

<style>

Q. 17   Which of the following CSS property is used to set the background image of an element?

background-image

Q. 18   Which of the following is the correct syntax to display the hyperlinks without any underline?

a {text-decoration : none;}

Q. 19   Which of the following is the correct syntax to make the background-color of all paragraph elements to yellow?

p {background-color : yellow;}

Q. 20   The HTML attribute used to define the inline styles is___________

text-shadow

Q. 21   Which of the following property is used as the shorthand property for the padding properties?

padding

Q. 22   The CSS property used to make the text bold is___________

font-weight : bold

Q. 23   The property in CSS used to change the background color of an element is_____________

background-color

Q. 24   Which of the following is the correct syntax for referring the external style sheet?

<link rel=”stylesheet” type=”text/css” href=”example.css”>

Q. 25   The HTML attribute used to define the inline styles is___________

style

Q. 26   The CSS property used to draw a line around the elements outside the border?

outline

Q. 27   Which of the following CSS property is used to specify the space between every letter inside an element?

letter-spacing

Q. 28   The CSS property used to make the rounded borders, or rounded corners around an element is________

border-radius

Q. 29   The CSS property used to specify the transparency of an element is____________

opacity

Q. 30   Which of the following property is used as the shorthand property of margin properties?

margin

Q. 31   The CSS property used to set the distance between the borders of the adjacent cells in the table is__________

border-spacing

Q. 32   Are the negative values allowed in padding property?

No

Q. 33   Which property is used to define the text color?

color

Q. 34   What are the valid values of font-style property?

inherit, italic, normal, oblique

Q. 35   Which CSS property is used to style the hyperlinks on hover (Mouse over)?

a:hover

Q. 36   Which CSS property and value is used to center an element?

text-align:center

Q. 37   What are the valid values of text-align property?

left, center, right, justify

Q. 38   Which CSS property is used to specify the space between lines?

line-height

Q. 39   Which CSS property is used to specify uppercase and lowercase letters in a text?

text-transform

Q. 40   Which CSS property specifies the type of positioning method used for an element?

position

Q. 41   What are the valid values for "position" property?

static, relative, fixed, absolute, and sticky

Q. 42   In how many ways can CSS be added to HTML?

Three

Q. 43   Which selector do we use to specify the rule for binding some particular unique element?

id

Q. 44   Internal styles are written within the _____ element.

<style>…</style>

Q. 45   HTML is what type of language ?

Markup Language

Q. 46   Which HTML tag produces the biggest heading?

<h1>

Q. 47   Which is correct?

<b>Click Here</b>

Q. 48   To create a link to an anchor, you use the______property in A tag.

Href

Q. 49   The page title is inside the____tag.

Head

Q. 50   <UL>…</UL> tag is used to ________

display the bulleted list

Q. 51   <TD>…</TD> tag is used to ________

Table Data

Q. 52   Which tag is used to create body text in HTML?

<BODY>

Q. 53   Which plugin is used to cycle through elements, like a slideshow?

carousel

Q. 54   Which plugin is used to create a modal window?

modal

Q. 55   Which plugin is used to create a tooltip?

tooltip

Q. 56   Ques. Bootstrap’s grid system allows up to

12 columns across the page

Q. 57   Which class should be used to indicate a button group?

btn-group

Q. 58   Which of the following bootstrap styles of buttons can be used to make the size of the button small?

.btn-sm

Q. 59   How many Container class are there in Bootstrap?

2

Q. 60   The _________ class is used to right-align navigation bar buttons.

.navbar-right

Q. 61   Which class is used to add buttons inside the navigation bar?

.navbar-btn

Q. 62   Bootstrap is developed by

Mark Otto and Jacob Thornton

Q. 63   Which of the following class is required to be added to form tag to make it inline?

form-inline

Q. 64   Which of the following bootstrap style is used to add standard links to .navbar?

navbar-link

Q. 65   How do you insert a comment in a CSS file?

/* this is a comment */

Q. 66   How do you change the left margin of an element?

margin-left:

Q. 67   Interpret this statement: <strong>Michelle</strong>

It will print out Michelle in bold font

Q. 68   What is the tag for an inline frame?

Iframe

Q. 69   Which of the following class in bootstrap is used to create a big box for calling extra attention?

.jumbotron

Q. 70   Which of the following class in Bootstrap is used to create a basic list group?

.list-group

Q. 71   Which of the following class in Bootstrap is used to create basic pagination?

.pagination

Q. 72   Which of the following class in Bootstrap is used to create a badge?

.badge

Q. 73   The class in Bootstrap which is used to specify the collapsible elements is -

.collapse

Q. 74   Which of the following class in Bootstrap is used for creating the large size modals?

.modal-lg

Q. 75   Which of the following is correct method to add a success button?

<button class = "btn btn-success"> success </button>

Q. 76   Which of the following class in Bootstrap is used to create a label?

.label

Q. 77   Which of the following is correct about the Bootstrap Grid system?

Both (a) and (b)

Q. 78   Which of the following class in Bootstrap is used to style a table with borders surrounding every element?

.table-bordered

Q. 79   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?

.table-hover

Q. 80   In the below code snippet, in what order will the margins be added ? p { margin: 25px 50px 75px 100px; }

Top, Right, Bottom, Left,

Q. 81   Which of the following class in Bootstrap is used to provide a responsive fixed width container ?

.container

Q. 82   How can we select an element with a specific ID in CSS ?

#

Q. 83   What type of CSS is generally recommended for designing large web pages ?

External

Q. 84   What type of CSS is the following code snippet ? <h1 style = "color:blue;" >A Blue Heading </h1>

Inline

Q. 85   How many columns are allowed in a bootstrap grid system ?

12

Q. 86   Which HTML tag is used to declare internal CSS ?

<style>

Q. 87   What are the attributes used to change the size of an image ?

Width and height

Q. 88   We enclose HTML tags within ?

< >

Q. 89   Which of the following tags doesn't require a closing tag ?

Both the <hr> and the <br> tag

Q. 90   Which property is used to define the font of the element's text?

font-family

Q. 91   Which is the correct inline CSS for p tag to define paragrap's text and background colors?

<p style="color: red; background-color: yellow;">

Q. 92   What does the abbreviation HTML stand for?

Hyper Text Markup Language.

Q. 93   What is the smallest header in HTML by default?

h6

Q. 94   How many sizes of headers are available in HTML

6

Q. 95   What are the types of lists available in HTML?

Ordered, Unordered Lists.

Q. 96   HTML files are saved by default with the extension?

.html

Q. 97   We enclose HTML tags within?

<>

Q. 98   What is the effect of the tag?

It converts the text within it to bold font.

Q. 99   Which of the following is correct about HTML?

HTML uses tags defined within the language.

Q. 100   How to display preformatted text in HTML?

<pre>

Q. 101   What is meant by an empty tag in HTML?

An empty tag does not require a closing tag

Q. 102   Which attribute is used to provide a unique name to an HTML element?

id

Q. 103   What is the function of the HTML style attribute?

It is used to add styles to an HTML element.

Q. 104   Which of the following is the correct syntax for using the HTML style attribute?

<tagname style "property: value;" >

Q. 105   Which HTML element is used to define description data?

<dd>

Q. 106   Which of the following properties is used to change the font of text?

font-family

Q. 107   How are quotations defined in HTML?

<blockquote >

Q. 108   What tag is used to render an image on a webpage?

img

Q. 109   Apart from <i> tag, which of the following tag is used to render a text in italics?

<em>

Q. 110   Colors are defined in HTML using?

All of the above

Q. 111   Which property is used to set colors in HTML?

color

Q. 112   What are the types of unordered lists in HTML?

Circle, square, disc.

Q. 113   Which property is used to set border colors in HTML?

border

Q. 114   Which of the following things are necessary to create an HTML page?

Both A and B

Q. 115   Which of the following is true about HTML tags?

Are not case sensitive

Q. 116   Which HTML tag is called the root element of an HTML document?

<html>

Q. 117   How is black color represented in terms of RGB values?

RGB(O, O, 0)

Q. 118   What does the Alpha value in RGBA represent?

Opacity value for a color.

Q. 119   What does the Alpha value of 0.0 represent?

Fully Transparent.

Q. 120   How to set a font for a whole page?

<defaultfont>

Q. 121   Before using a pointer variable, it should be ___.

Both A. and B.

Q. 122   Which HTML tag is used to set up a Javascript–like client?

<script>

Q. 123   What are the main components of the front end of any working website?

HTML, CSS, Javascript.

Q. 124   What is the select tag used for?

Creates a combo box.

Q. 125   The most basic part of any HTML page is?

ASCII Text

Q. 126   What are those objects called which are used for storing data on the client provided by the HTML local storage?

Both A and B

Q. 127   The default value of the BORDER attribute is?

1 pixel

Q. 128   What are some valid character sets available?

All of the above

Q. 129   How many characters can be written in I KB?

1024

Q. 130   Which of the following are examples of block–level elements in HTML?

All of the above

Q. 131   What are the properties of block-level elements?

All of the above.

Q. 132   If a background image is smaller than the screen on which it is being displayed, what will occur on the webpage?

The image will be repeated

Q. 133   Which property allows an image link to show a text label?

alt

Q. 134   What is CSS stands for in Webdesign?

Cascading Style Sheets

Q. 135   What CSS describes?

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

Q. 136   What is a CSS selector?

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

Q. 137   In a CSS file, there is a CSS rule for paragraphs tags — what does p can be called?

Selector

Q. 138   Internal styles are written within the element.

<style>...</style>

Q. 139   Inline styles are written within the attribute.

style

Q. 140   CSS comments are placed within the

/* and */

Q. 141   Can comments also span multiple lines?

Yes

Q. 142   Which property is used to define the text color?

color

Q. 143   Which property is used to define the background color?

Both A. and C.

Q. 144   From the given options which is/are the valid way to represent a color?

All of the above

Q. 145   Which property is used to define the font of the element is text?

font-family

Q. 146   To make a text italic, which CSS property is used?

font-style

Q. 147   Why font-weight property is used?

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

Q. 148   What is/are the correct value(s) of font-weight property?

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

Q. 149   What is the correct syntax of border property in CSS?

border: border-width border-style border-color

Q. 150   Which of the following is the correct syntax to remove the underline on hyperlinks and visited hyperlinks?

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

Q. 151   Which CSS property is used to style the hyperlinks on hover (Mouse over)?

a:hover

Q. 152   If you want to use a green dotted border around an image, which CSS property is used for that?

Both A. and B.

Q. 153   Which CSS property and value is used to center an element?

text-align:center

Q. 154   What are the valid values of text-align property?

left, center, right, justify

Q. 155   What is the use of "text-align:justify" in CSS?

Stretches the lines so that each line has equal width

Q. 156   Which CSS property is used to specify the indentation of the first line of a text?

text-indent

Q. 157   Which CSS property is used to specify the space between the characters in a text?

letter-spacing

Q. 158   Which CSS property is used to specify the space between lines?

line-height

Q. 159   Which CSS property is used to specify the space between the words in a text?

word-spacing

Q. 160   Which CSS property adds shadow to text?

text-shadow

Q. 161   Which CSS property is used to specify uppercase and lowercase letters in a text?

text-transform

Q. 162   Which is the correct CSS statement to capitalize the first letter of each word?

text-transform: capitalize

Q. 163   What are the valid values of text-transform property?

uppercase, lowercase, and capitalize

Q. 164   What are the valid values of "text-decoration" property?

overline, line-through, underline, and none

Q. 165   Which CSS property specifies how to align the last line of a text?

text-align-last

Q. 166   Which CSS property sets the vertical alignment of an element?

vertical-align

Q. 167   What are the valid values of vertical-align property?

baseline, text-top, text-bottom, sub, and super

Q. 168   Which CSS property specifies the type of list item marker?

list-style-type

Q. 169   Which is the correct CSS statement is used to remove the markers/bullets?

list-style-type: none;

Q. 170   Which CSS property specifies an image as the list item marker?

list-style-image

Q. 171   Which CSS property specifies if/how an element is displayed?

display

Q. 172   Which CSS property specifies the type of positioning method used for an element?

position

Q. 173   HTML elements are positioned by default.

static

Q. 174   What are the valid values for "position" property?

static, relative, fixed, absolute, and sticky

Q. 175   Which CSS property specifies the opacity/transparency of an element?

opacity

Q. 176   Which CSS function performs a calculation to be used as the property value?

calc()

Q. 177   Which CSS function uses the largest value?

max()

Q. 178   Which CSS function uses the smallest value?

min()

Q. 179   What is CSS?

All of the above

Q. 180   The <style> in Internal CSS refers to

HTML tags

Q. 181   Can we link multiple stylesheets to a single page?

Yes

Q. 182   The CSS property used to change text sizes?

font-size

Q. 183   In this line of code, identify the selector
p {border: 2px solid blue;}

p

Q. 184   How many color names does CSS supports?

140

Q. 185   The property is used in the positioning of the background image.

background-position

Q. 186   what means 4 times the size of the current font.

4em

Q. 187   Amongst the following browsers, which browser supports almost all the CSS properties?

Google Chrome

Q. 188   What is the CSS Entity for the character "#"?

0023

Q. 189   This selector selects all the elements where the parent is a
element.

h > p

Q. 190   Which selector selects the markers of list items?

::marker

Q. 191   Which is the most widely used font in customizing web pages?

Arial

Q. 192   Which of the following CSS properties are animatable?

animation

Q. 193   We can give space between unit and value when assigning length values to CSS properties.

False

Q. 194   Which of these units of length is supported by Chrome Version 1.0?

px

Q. 195   Which line of code is a must to write to apply CSS Flexbox properties?

display: flex;

Q. 196   The default value of justify-content property is

flex-start

Q. 197   Which is the correct syntax for adding animation?

animation: name duration timing-function

Q. 198   Which line of code specifies playing an animation with the same speed from beginning to the end?

div {animation- timing function: linear;)

Q. 199   Which line of code represents a universal selector?

*{border: 2px solid red;}

Q. 200   Which of the following properties specify the width of the borders?

Both A and C

Q. 201   Is border-image property animatable?

No

Q. 202   Which cursor property value indicates that the program is busy?

wait

Q. 203   What does this line of code explain? p {display: flex;}

All the elements are displayed as an inline flex container

Q. 204   The text-align property defines the alignment of text in an element.

horizontal

Q. 205   Does the z-index property accept negative values?

Yes

Q. 206   Which CSS property is not supported by the Firefox browser?

viewport

Q. 207   Which one is a fallback font?

Serif

Q. 208   Where do we store external stylesheets?

CSS files

Q. 209   In the given line of code, identify the type of selector used. #Main {background-color: yellow;}

CSS id selector

Q. 210   The Hex Code for the white color is

#FFFFFF

Q. 211   In CSS, what does HSL stands for?

hue, saturation, lightness

Q. 212   Among the following CSS properties, which property is not a shorthand property?

display

Q. 213   In this line of code, what is the use of the alt attribute? it is red

Both A. and B.

Q. 214   The CSS border property specifies the style, color, and of an element border.

width

Q. 215   What does "padding: 50px 20px;" specifies?

Both A. and B.

Q. 216   What is the default size for normal text, like paragraphs?

16 px

Q. 217   Which of the following CSS selectors are used to specify a group of elements?

class

Q. 218   Which of the following has introduced text, list, box, margin, border, color, and background properties?

css

Q. 219   Which of the following CSS framework is used to create a responsive design?

bootstrap

Q. 220   Which of the following CSS property is used to make the text bold?

font-weight: bold

Q. 221   What will be the output of following CSS code snippet?
hl {color: "greenn ; }

nothings happen

Q. 222   Which of the following CSS style property is used to specify an italic text?

font-style

Q. 223   What will be the output of following CSS code snippet?

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

only font-style: italic works

Q. 224   Which of the following are the CSS Extension Prefixes for Webkit?

-webkit

Q. 225   Which of the following function defines a linear gradient as a CSS image?

linear-gradient()

Q. 226   Which of the following is the correct way to apply CSS Styles?

All of the above.

Q. 227   Which of the following CSS property sets the font size of text?

font-size

Q. 228   Which of the following is not the property of the CSS box model?

color

Q. 229   What will be the output of the following CSS code snippet?

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

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

Q. 230   Which of the following CSS property sets the shadow for a box element?

box-shadow

Q. 231   Which of the following CSS property is used to set the color of the text?

color

Q. 232   Which of the following CSS Property controls how an element is positioned?

position

Q. 233   Which of the following CSS property is used to specify table borders in CSS?

border

Q. 234   Which Is The Correct CSS Syntax?

body {color: Black}

Q. 235   Which CSS Property Sets A Background Image For An Element?

Background - Image

Q. 236   What Should Be The Table Width, so That The Width Of A Table Adjust To The Current Width Of The Browser Window?

100%

Q. 237   When We Write <img src="img.png"> What "img.png" Inside Double Quote Implies?

Value

Q. 238   The Default Value Of "position" Attribute Is

Static

Q. 239   Who invented css?

Hakon Wium Lie

Q. 240   CSS is written in which language?

HTML

Q. 241   What is the latest version of css?

css 3

Q. 242   how will you make all paragraph elements red in color?

p {color: red;}

Q. 243   HTML document start and end with which tag pairs?

<HTML> ... </HTML>

Q. 244   <TITLE> ... tag must be within _______

Header

Q. 245   Text within ... <STRONG> tag is displayed as _____

bold

Q. 246   Which tag is used to display the numbered list?

<OL > ... </OL >

Q. 247   <SCRIPT> tag can be placed within____

both A and B

Q. 248   using <P>tag will

start a new paragraph

Q. 249   <TD > tag is used for ________

Table Records and table data

Q. 250   Which HTML Tag will use to scroll a text in web page?

< marquee> ... </marquee >

Q. 251   WWW stands for ______.

World Wide Web

Q. 252   A homepage is __________.

the first page of a website

Q. 253   ____is a document commonly written in Hyper Text Markup Language (HTML) that is accessible through the Internet or other network using an internet browser.

Web page

Q. 254   A web page is located using a _____.

Uniform Resource Locator

Q. 255   A piece of icon or image on a web page associated with another webpage is called____________.

hyperlink

Q. 256   ________ is a collection of web pages.

Web site

Q. 257   What is the correct HTML tag for inserting a line break?

< br>

Q. 258   Webpage starts with which of the following tag?

<html >

Q. 259   JPG sometimes called ________.

JPEG

Q. 260   “Yahoo”, “Infoseek” ,"Google" and “Lycos” are _________?

search engines.

Q. 261   A webpage displays a picture. What tag was used to display that picture?

img

Q. 262   < b>tag makes the enclosed text bold. What is other tag to make text bold?

<strong >

Q. 263   Tags and text that are not directly displayed on the page are written in _ section.

<head>

Q. 264   Which tag inserts a line horizontally on your web page?

<hr>

Q. 265   What should be the first tag in any HTML document?

<html>

Q. 266   Which tag allows you to add a row in a table?

<tr> and </tr>

Q. 267   How can you make an e-mail link?

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

Q. 268   Choose the correct HTML tag to make a text italic

<i>

Q. 269   Which tag creates a check box for a form in HTML?

Q. 270   To create a combo box (drop down box) which tag will you use?

<select>

Q. 271   Which of the following is not a pair tag?

<img>

Q. 272   To create HTML document you require.

Just a notepad can be used

Q. 273   The special formatting codes in HTML document used to present content are

tags

Q. 274   HTML documents are saved in

ASCII text

Q. 275   Some tags enclose the text. Those tags are known as

Pair tags

Q. 276   The _____ character tells browsers to stop tagging the text

/

Q. 277   In HTML document the tags

can be written in both uppercase or lowercase

Q. 278   Marquee is a tag in HTML to

Display text with scrolling effect

Q. 279   To create a blank line in your web page

insert < BR > tag

Q. 280   The way the browser displays the object can be modified by _____

attributes

Q. 281   Which of the following HTML code is valid?

None of the above.

Q. 282   Which of the following is an attribute related to font tag?

All of the above

Q. 283   HTML supports

both type of lists

Q. 284   What tag is used to list individual items of an ordered list?

LI

Q. 285   Which attribute is used withimg tag to display the text if image could not load in browser?

alt

Q. 286   Which attribute you’ll use with TD tag to merge two cells horizontally?

colspan=2

Q. 287   A webpage displays a picture. What tag was used to display that picture?

img

Q. 288   Which of the following is correct about Bootstrap?

All of the above.

Q. 289   Which of the following is correct about Bootstrap?

All of the above

Q. 290   Which of the following is a part of Mobile First Strategy of Bootstrap?

All of the above.

Q. 291   Which of the following is correct about Bootstrap Grid System?

All of the above.

Q. 292   Which of the following is correct about Bootstrap Grid System?

All of the above.

Q. 293   Which of the following is correct about Bootstrap Media Query?

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

Q. 294   Which of the following is correct about Bootstrap Media Query?

Both of the above.

Q. 295   Which of the following is correct about Bootstrap Mobile First Strategy?

All of the above.

Q. 296   Which of the following class styles a table as a nice basic table with just some light padding and horizontal dividers?

.table

Q. 297   Which of the following class styles a table as a nice basic table with stripes on rows?

.table-striped

Q. 298   Which of the following class styles a table with borders surrounding every element and rounded corners around the entire table?

.table-bordered

Q. 299   Which of the following class styles a table with a light gray background to rows while the cursor hovers over them?

.table-hover

Q. 300   Which of the following class applies the hover color to a particular row or cell of a table?

.active

Q. 301   Which of the following class indicates a successful or positive action?

.success

Q. 302   Which of the following class indicates a warning that might need attention?

.warning

Q. 303   Which of the following class indicates a dangerous or potentially negative action?

.danger

Q. 304   Which of the following class can be used to create a responsive table?

.table-responsive

Q. 305   Which of the following class is required to be added to form tag to make it inline?

.inline

Q. 306   Which of the following class is required to be added to form tag to make it horizontal?

.form-horizontal

Q. 307   Which of the following bootstrap style of button creates a default/ standard button?

.btn

Q. 308   Which of the following bootstrap style of button provides extra visual weight and identifies the primary action in a set of buttons?

.btn-primary

Q. 309   Which class adds zebra-stripes to a table?

.table-striped

Q. 310   Which class shapes an image to a circle?

.rounded-circle

Q. 311   Which class is used to create a big box for calling extra attention?

.jumbotron

Q. 312   Which button class is used to create a large button?

.btn-lg

Q. 313   Which class is used to create a button group?

.btn-group

Q. 314   Which class is used to create a badge?

.badge

Q. 315   Which class is used to create a loader?

.spinner-border

Q. 316   Which class is used to create a basic pagination?

.pagination

Q. 317   Which class is used to create a basic list group?

.list-group

Q. 318   Which class adds a heading to a card?

.card-header

Q. 319   Which class indicates a dropdown menu?

.dropdown

Q. 320   A standard navigation bar is created with:

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

Q. 321   Which component is used to cycle through elements, like a slideshow?

Carousel

Q. 322   Which attribute is used to create a tooltip?

data-toggle="tooltip"

Q. 323   Which contextual class indicates a succesful or positive action?

.bg-success

Q. 324   Which contextual class indicates a dangerous or potentially negative action?

.bg-danger

Q. 325   The Bootstrap grid system has four classes which defines screen size:

xs, sm, md, lg

Q. 326   Which class is use to display black navigation bar?