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CSS Interview Questions and Answers

In this article we have gathered the latest and most asked CSS interview questions and answers for both fresher and experienced. If you’re preparing for a job interview in the web development field, it’s important to have a solid understanding of CSS, or Cascading Style Sheets. CSS is a crucial component of modern web design, used to define the visual appearance and layout of web pages. Whether you’re a seasoned CSS developer or just starting out, this guide will provide valuable insights into the world of CSS and help you prepare for your next job interview with confidence.

CSS stands for Cascading Style Sheet. It’s a style sheet language that determines how the elements/contents in the page are looked/shown. CSS is used to develop a consistent look and feel for all the pages.

CSS Interview Questions and Answer

These CSS interview questions will help job seekers to prepare well for the job interview and cross the panel discussion easily.

So let’s get started :

1. What is CSS?
2. What are the limitations of CSS?
3. What are the advantages of using CSS?
4. What do you mean by CSS frameworks?
5. What does CSS selector mean?
6. What are the various “fonts” attributes?
7. What is the use of CSS Opacity?
8. What are some major versions of CSS?
9. Which command is used for the selection of all the elements of a paragraph?
10. What is the difference between inline, inline-block, and block?
11. What is the use of % unit?
12. How can the dimensions be defined as an element?
13. Does margin-top or margin-bottom have an effect on inline elements?
14. Name the property used to specify the background color of an element.
15. Name the property for controlling the image repetition of the background.
16. Why should we use float property in CSS?
17. Name the property for controlling the image position in the background.
18. What is the difference between class selectors and id selectors?
19. What is RWD?
20. What are the different ways to hide the element using CSS?

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1. What is CSS?

CSS stands for Cascading Style Sheet. It is a popular styling language which is used with HTML to design websites. It can also be used with any XML documents including plain XML, SVG, and XUL.

2. What are the limitations of CSS?

Some of the limitations of CSS are:

  • Ascending by selectors is not possible
  • Limitations of vertical control
  • No expressions
  • No column declaration
  • Pseudo-class not controlled by dynamic behavior
  • Rules, styles, targeting specific text not possible

3. What are the advantages of using CSS?

Some of the advantages of CSS are:

  • Accessibility
  • Bandwidth
  • Page reformatting
  • Site-wide consistency
  • Content separated from presentation.

4. What do you mean by CSS frameworks?

CSS frameworks are the preplanned libraries which make easy and more standard compliant web page styling. The frequently used CSS frameworks are: –

  • Bootstrap
  • Foundation
  • Semantic UI
  • Gumby
  • Ulkit

5. What does CSS selector mean?

CSS selector is a string that identifies the elements to which a particular declaration is applied. It is also known as a link between an HTML document and a style sheet. It is equivalent to HTML elements. Different types of selectors are listed below :

  • CSS Element Selector
  • CSS Id Selector
  • CSS Class Selector
  • CSS Universal Selector
  • CSS Group Selector

6. What are the various “fonts” attributes?

Some of the font attributes are:

  • Caption
  • Icon
  • Font weight
  • Font family
  • Font style etc.

7. What is the use of CSS Opacity?

The CSS opacity property is used to specify the transparency of an element. In simple words, you can say that it specifies the clarity of the image. In technical terms, opacity is defined as the degree to which light is allowed to travel through an object. For example:

<style>    
img.trans {    
    opacity: 0.4;    
    filter: alpha(opacity=50); /* For IE8 and earlier */    
}    
</style>

8. What are some major versions of CSS?

Some major versions of CSS are:

  • CSS1
  • CSS2
  • CSS2.1
  • CSS3
  • CSS4
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9. Which command is used for the selection of all the elements of a paragraph?

The p[lang] command is used for selecting all the elements of a paragraph.

10. What is the difference between inline, inline-block, and block?

Inline Elements: Inline elements don’t start on a new line, they appear on the same line as the content and tags beside them. Some examples of inline elements are <a>, <span> , <strong>, and <img> tags.

Inline Block Elements: Inline-block elements are similar to inline elements, except they can have padding and margins and set height and width values.

Block Element: The block elements always start on a new line. They will also take space for an entire row or width. List of block elements are <div>, <p>.

11. What is the use of % unit?

It is used for defining percentage values.

12. How can the dimensions be defined as an element?

Dimension properties can be defined by:

  • Max- height
  • Height
  • Width
  • Max-width etc.

13. Does margin-top or margin-bottom have an effect on inline elements?

No, it doesn’t affect the inline elements. Inline elements flow with the contents of the page.

14. Name the property used to specify the background color of an element.

The background-color property is used to specify the background color of the element. For example:

<style>    
h2,p{    
    background-color: #f5f5f5;    
}    
</style>

15. Name the property for controlling the image repetition of the background.

The background-repeat property repeats the background image horizontally and vertically. Some images are repeated only horizontally or vertically. For example:

<style>    
body {    
background-image: url("tree.gif");    
margin-left:100px;    
}    
</style>

16. Why should we use float property in CSS?

The float property is used for positioning the HTML elements horizontally either towards the left or right of the container. For example:

float-demo {
     float: right; 
}

17. Name the property for controlling the image position in the background.

The background-position property is used to define the initial position of the background image. By default, the background image is placed on the top-left of the webpage. You can set the following positions:

  • center
  • top
  • bottom
  • left
  • right
background: white url('good-night.jpg');  
background-repeat: no-repeat;  
background-attachment: fixed;  
background-position: top;

18. What is the difference between class selectors and id selectors?

The class selector is given an aggregate block while the id selector takes only a single element distinct from the other elements. For example:

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CSS Class Selector

<style>    
.center {    
    text-align: center;    
    color: blue;    
}    
</style>

CSS Id Selector

<style>    
#para1 {    
    text-align: center;    
    color: blue;    
}    
</style>

19. What is RWD?

RWD stands for Responsive Web Design. This technology is used to make the designed page appear perfectly on every screen size and device, for example, mobiles, tablets, desktops and laptops. You don’t need to create a separate page for each device.

20. What are the different ways to hide the element using CSS?

display: none : Using display property. It’s not available for screen readers. The element will not exist in the DOM if display: none is used.

visibility: hidden :Using visibility property, will take up the space of the element. It will be available to screen reader users. The element will actually be present in the DOM, but not shown on the screen.

position: absolute : Using position property. Make it available outside the screen

We hope these CSS Interview Questions help you in cracking your next Programming Interview.

All The Best!

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