Top CSS Interview Questions And Answers

css interview questions and answers

Basic CSS Interview Questions Answers

CSS is a very important aspect of website design. It enhances the visual presentation of your web page content and grabs user attention. It impacts the look and feel of your web page at a single glance. A developer with added skill in CSS is can be a centre of attraction for the companies.

Designing aspects are the major demand in the industry, you can kick start your development career or boost your presence by simply adding CSS skill in your CV. Here we have brought the Top 30 CSS Interview Questions to give you a basic idea of CSS overview.

Table of Contents

 1 What is CSS?

CSS stands for cascading style sheet. It is widely used by the developers to style the website content and HTML webpage. It has become an important part of the design. It ensures how your webpage will look like at a glance. Organization prefers developers who are skilled in programming languages along with CSS styling techniques.

It was designed to enhance the visual appearance of the web pages. CSS was developed by the World Wide Web consortium simply known as W3C.

2 What is the main function of CSS?

CSS was designed to enable the developer to enhance the visual appearance of the web pages. The main function of CSS is to separate the content from the structure of the website code from the visual design page. You can build your CSS code into a different file altogether and apply that to your webpage by simply calling the CSS file in the HTML web page tag.

3 What is the recent version of CSS?

CSS 5 is the most advanced version.

4 Define the ways to integrate CSS code into your HTML page?

CSS has completely changed the perception of the developer towards designing the web pages for the websites.

Three Ways That Allow Developers To Add CSS In The HTML Page Are As Follows :

 1 ] Integrating style in a style tag in the head section of the HTML page. This is also called Internal CSS

h1 {color:red;}
p {color:blue;}
<h1>A heading</h1>
<p>A paragraph.</p>

2 ] Using Inline styling. This is also called Inline CSS.

<h1 style="color:blue;">This is a Blue Heading</h1>

3] Using external CSS. For ex: you can create your CSS code into an entirely different file and integrate that using External CSS Code.

<!DOCTYPE html>
<link rel="stylesheet" href="styles.css">
<h1>This is External CSS</h1>
<p>This is External Example </p>

5  Explain the meaning of Cascading in the style sheet?

Before inventing CSS it was difficult to style the web pages using the codes in HTML head tag. CSS made it easier for the developers to design the outlook of the website. Cascading made it simple and easier for the developer the implement creative designs using CSS.

There Are Three Major Ways Through Which CSS Cascade :

  • Elements:
    You can use the element to apply the same style to many elements.

  • Multiple Style One Element:
    Multiple styles can be applied to an HTML tag at a time to get a specific style.

  • Same style Multiple Pages:
    Template styling can be achieved using the same style Multiple Pages option.

6 List out the advantages of using CSS.

CSS comes with N number developer and User-friendly benefits. Let’s discuss some of the key highlights of CSS.

  • Creative designs applied to multiple pages using the single CSS file.

  • Consistency can be maintained using a single page CSS.

  • Waste collection of formatting options

  • The flexibility of representing different styles to different viewers.

  • Lightweight code with a great level of accessibility of integration in HTML.

  • The huge set of features to define and visualize the user experience at a highly creative scale.

  • Easy to use language enhances the developer’s proficiency to deliver great web pages.

7 What are the most prominent frameworks in CSS?

CSS Consists Of The Below FrameWorks :

  • Bootstrap

  • Foundation

  • Semantic UI

  • ULkit

8 Define the difference between ID and Class in CSS.

ID: It is a unique value assigned to any particular element. For every single element, only one ID can be assigned. When a specific style tried to be achieved using CSS code ID is the best option to define the style. Example of ID declaration in CSS

<div id=”Left”>

A class can be used to identify more than one element in a CSS block. The HTML elements can be targeted collectively using the class option. The class cannot be defined as unique as multiple elements can belong to one particular class. 

For Example :

<div id=”Left”>
</h1> This is Class Example</h1>
</p class=”Introduction”> This is my first code in CSS</p>
</p class=”Introduction”> This is my second line of code in CSS</p>

9 Define the RGB stream in CSS.

RGB is a collection of colour codes using which you can style your web page in CSS. RGB represents three combinations in this nomenclature that is RED, GREEN, BLUE streams. You can lift the intensity of the colours up and down using the given range from 0 to 256. It allows you to use a wide spectrum of colours using different colour codes.

10 Explain the three ways to assign a certain colour to an element in CSS?

Hexadecimal notation :
In hexadecimal string notation, a color always starts with “#”, after that you can add the hexadecimal color code for your particular choice. This hexadecimal string is case sensitive.

RGB Functional Notation :
In the place of string, RGB is defined using the RGB () function. This function holds the input parameters as the value of RED, GREEN, and BLUE from the color spectrum.

HSL Functional Notation :

HSL (Hue/Saturation/Luminosity) color method is the widely used technique by the designers and the artists. You can represent HSN color on the web page using HSL function (). HSL function is defined in the same way as RGB () function in CSS.

 11 How to write the code to target h2 and h3 with the same style.

CSS allows you to target multiple elements using the comma (, ) separator. For example

  h2, h3 {
color: red;

12 Define Float property used in CSS.

As the name itself defines that the float is used to move the element from left to right or right to left in the container. It allows the inline text and function to wrap around the float to move in any direction of your choice. It removes the element from the main page flow but it always remains the part of the web page natural flow.

float: none;
float: right;
float: left;

13 List out the different modules used in the current version of CSS.

CSS is having huge set modules to help the users achieve their creative designs using the language. Here are the few of them.

  • Selectors

  • 2D/3D Transformations

  • Animations

  • Box Model

  • Backgrounds and Borders

  • Text Effects

  • Multiple Column Layout

  • User Interface

14 List out the media types allowed in CSS.

There are four types of media properties supported by CSS.

a> All: It is used for all media devices.
b> Printer: For printer support
c> Speech: For reading the page out loud, screenreaders
d> Screen: Used for smart phones, computers, laptops, and tablets

15 What is the difference between features in CSS2 and CSS3?

CSS3 is the advanced version of CSS2. Let’s discuss some of the differences in them.

  1. CSS3 modules that are the collection of various sections. But CSS2 comes into a single document format where everything is defined within this document.

  2. CSS3 comes with advanced feature to support on any browsers that mean it almost support all browsers. But CSS2 comes with certain limitations in that.

  3. CSS3 has a more extensive range of graphical features such as border-radius, box-shadow, flexbox, and many more. But CSS2 has limitations in terms of graphics.

16 What is the use of an external style sheet?

You can write all the style code in a single document and latter integrate it with your HTML code. You just need to refer the link of the external CSS file properly to apply the design in n number of web pages. If you make any changes to the external file the same changes will reflect on the web page.

17 Define the use of the embedded style sheet.

Using the inline or embedded CSS you get the flexibility to define your CSS code into the HTML page. Multiple classes can be used using the embedded CSS and those classes can be applied to multiple tags on your webpage. There is no extra downloading time required if you try to import that information.

<!DOCTYPE html>
<style type="text/css">
p {
font-family: georgia, serif;
font-size: x-large;
a:hover {
color: blue;
text-decoration: none;
<body><p> This is the example of embedded code in single HTML page.

18 What is the use of a CSS selector?

The selector is a feature defined in CSS to select the specific content and apply the user-defined style to that. It works as a bridge between the style sheet and the HTML page.

19 What is twining in CSS?

For creating intermediate frames between two images to display the first image first we use twinning in CSS. The main purpose of the twinning is to create animation visuals.

20 What is Image scripting in CSS?

These are a group of images placed under one image. It increases the web pages’ response time by reducing the load caused by multiple images to load at a time into a single webpage.

21 What do you mean by a responsive web page?

The responsive web page is the modern concept in website designing. It allows the websites to load and respond as per the user compatibility to visualize in their device. It takes care of things like the size of the web page, portability, speed on the different device setup such as laptop, mobile, and tabs.

22 Define Gradients in CSS?

The gradient is the feature defines in CSS which allows two or more colours to create and smooth transformed layer.

CSS Proposes Two Types Of Gradient That Are :

  • Linear Gradient

  • Radial Gradient

23 What is the difference between padding and margin in CSS?

Margin and padding are the CSS properties that allow you to create defined space between the container or div and the text.

Margin is the defined space around the specified element and padding is the space defined at the external border of the element.

24 Define margin properties in CSS?

Margin also holds many properties such as

  • margin-top

  • margin-left

  • margin-right

  • margin-bottom

25 Define margin values. 

Margin properties define some values as well such as

    Auto : It is automatically calculated space by the browser.
Length : you can set the margin values in px (pixels), pt, and cm.
%          :  you can define the width percentage of the container.
Inherit : you can inherit the margin properties from the parent element.

26 Define CSS Padding?

List Of Padding Properties in CSS
Padding –Top
Padding –right
Padding- left
Padding –bott

27 Describe all the position states in CSS.

There are four positions stated in CSS.

  • Static (default )

  • Relative

  • Fixed

  • Absolute

28 Describe the navigation bar in CSS?

You can transform an ordinary web page into a user-specific and more dynamic web page using the navigation bar. Navigation bar holds the list of links that simplifies the use of <ul> and <li> elements.

ul {
list-style-type: none;
margin: 0;
padding: 0;

29 What is the way to add icon in the web page?

You can simply use the icon library to add icons to your web page. You need to add the name of the chosen icon class to your inline HTML element (forex or ). These icons are the scalable vectors available in the CSS library. 

30 Describe CSS Pseudo Class?

To define a special state of HTML element pseudo-class is the best option.

Here is the example of pseudo-class in CSS

selector:pseudo-class {

Pseudo element in CSS.
This element gives you the flexibility to style the given element in CSS. Using this feature you can style first line or first letter on a web page. Here is the example of pseudo-element. 

selector::pseudo-element {

Now, you are ready with the CSS basic terminologies and function, start your advanced learning over CSS, and add this skill to your resume to impress the recruiter. CSS adds an extra advantage to your developer career so keep enhancing your skill with us.