CSS Interview Questions

CSS Interview Question and Answers

Got to attend an interview of CSS? Well, here we have got you covered with our astonishing collection of CSS interview questions and answers that covers the rare basics of the CSSs as well as the top canopy of it.

These CSS questions are very simple and easy to understand as these are not like the whole chapter notes instead these are only the main texts that can be said as the keynotes that are generally used in the industry to judge an individual.

Whether you are a beginner or experienced these CSS questions and answers will help you understand the very deep aspect of it very easily. If you are a beginner or an experienced professional these CSS interview questions and answers will help you in getting all the facts and points that are missing from your brain’s library and hence, you can easily brush up your CSS concepts.

Here is the list of CSS interview questions and answers that are asked most frequently:

1. What is CSS?

The full form of CSS is cascading stylesheet. It is a styling language by which we can set the behavior of an HTML webpage. Several HTML webpages layout are controlled by CSS. It is popular in web designing and helps how to display the HTML content on screen. Its application is common in XHTML also.

2. Explain what are the different variations of CSS?

• CSS 1
• CSS 2
• CSS 2.1
• CSS 3
• CSS 4

3. How can you Cite different types of CSS?

• External – It is a separate file for styling, and must be saved with a .css extension. It should not contain any HTML tags. By using the external you can change the overall look of website by changing just one file.
• Internal – Internal CSS are always defined inside the <style> element in the head section of an HTML page.
• Inline – using inline CSS you can add style in the right to the text, and you can apply a unique style to the single element as you need.

4. Explain what are the components of a CSS Style?

CSS style components is made up of three parts:

• Selector – Selector is any HTML tag like H1, p, table, etc. at which you can applied CSS.
• Property – It is like an attribute of a HTML tag. By using CSS property you can simply styling the HTML tags like changing text color, add border, font-size, etc.
• Value – It can always assigned to properties, like if you want to change text color in black. You can simply display the color name black or value-#000.

5. Explain what are the CSS frameworks?

CSS frameworks are predefined libraries which makes easy to styling the web pages.

• Bootstrap
• Semantic UI
• Gumby
• Foundation
• Ulkit

6. What do you mean by CSS selector?

CSS selectors are used to apply CSS to that particular HTML element you want to style.

These are several different types of CSS selectors:

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

7. What is the use of CSS Opacity?

CSS opacity property is used to specify the transparency or clarity of an element. Yu can use opacity in images as well as text.

For example:

h1{
color:red;
opacity:0.4;
}

8. Explain universal selector?

Universal selector selects all elements and any type of elements in an HTML page instead of selecting elements of a specific type. The symbol is used to denote CSS universal selectors is an Asterisk (*).

For example:

* {CSS -Property: value; ........................}

9. Which property is used for controlling the image position in the background?

By default the background image is display in the top left of the web page. To define the initial position of the image, use background-position property.

These are the following position to set the background image:

• center
• top
• bottom
• right
• left
• For Example:

  Background: white url('smiley.jpg');  
  Background-repeat: no-repeat;  
  Background-attachment: fixed;  
  Background-position: top; 
  

  10. Which property is used to control the image scroll in the background?

  The background-attachment property is used to control the image scroll in the background. Background-attachment: fixed property fixed the image and rest of the page are scroll.

  For example:

  Background: white url(‘smiley.gif');  
  Background-attachment: fixed;
  Background-repeat: no-repeat;  
  

  11. What do you mean by float property in CSS?

  Float property is used to move text or images to the left or right.

  For example:

  <Style>
      img {
  Float: right;
  }
   P {
  Float: left;
         }
   </style>
  

  12. What is the role of z-index in CSS and how is it used?

  Z-index helps to positioning elements that may overlap one another. A higher values of z-index element is always stacked above than the lower value of z-index element. Its default value is zero and you can take a number either a positive or negative.

  13. What is the main difference between class selectors and id selectors?

  Class (denoted by symbol (.)) selectors is used in many elements but id (denoted by symbol (#)) selectors is used only in single element which is different from other elements id.

  For example:

  <Style>    
  .demo {    
      Text-align: center;    
      Color: green;    
  }    
  </style>  
  
  <Style>    
  #heading {    
      Text-align: center;    
      Color: red;    
  }    
  </style>
  

  14. What do you understand by W3C?

  W3c stands for World Wide Web consortium. Its purpose is to deliver the World Wide Web information and develops the rules and guidelines.

  15. What do you mean by CSS Box model and what are its elements?

  The design and layout of elements are define by using CSS box model.

  These are the following elements:

  • Margin – It is transparent and removes the area around the border.
  • Border – the padding area is represented by padding.
  • Padding – it is transparent and removes the area around the content.
  • Content- text, images, etc. are represented by content.

  16. What do you mean by visibility: hidden and display: none?

  Visibility: hidden and display: none both are used to hide the elements in web page but the minor difference is visibility: hidden hides the element but it occupies space and affects the layout. On the other hand, display: none is also hide the element but it does not occupies the space.

  17. Which property is used to set the width of the outline?

  To set the width of the outline you can use outline-width property.

  18. Which property of a table is used to the appearance of the adjacent borders?

  The border-collapse property is used to specify the appearance of the adjacent borders that each cell should maintain its style.

  19. Which property is used for the bottom padding of an element?

  Padding-bottom property is used to specify the bottom padding of an element.

  20. Which property is used for the left padding of an element?

  Padding-left property is used to specify the left padding of an element.

  21. Which property is used for the top padding of an element?

  Padding-top property is used to specify the top padding of an element.

  22. Which property is used for the right padding of an element?

  Padding-right property is used to specify the right padding of an element.

  23. Which property allows you to display the type of cursor that should be seen by the user?

  The cursor property of CSS is used to display the type of cursor that should be seen by the user.

   

  24. What do you mean by an attribute selector?

  You can apply the styles to the particular attribute in the HTML element.

  For Example:

  <input type="text">, here "type" is an attribute.
  Input [type = "text"] {
     Color: #cccccc; 
  }
  

  25. In how many formats you can display a CSS color?

  Format	Syntax	Example
  Hex Code	#0066ff	p{color:#cccccc;}
  RGB %	rgb(rrr%,ggg%,bbb%)	p{color:rgb(50%,50%,50%);}
  Short Hex Code	#RGB	p{color:#000;}
  RGB Absolute	rgb(rrr,ggg,bbb)	p{color:rgb(0,0,255);}
  keyword	blue, black, etc.	p{color:orange;}

  26. What do you mean by animation in CSS?

  Animation allows you to animate any HTML content in the web page. Using CSS animation you can change elements from one style to another by using the keyframe to the animation name.

  27. Explain what is a media query?

  Media query is used to make website responsive in all types of screen width (desktop, laptop, mobile phones, etc.). We can add a breakpoints where the design will automatically change on each side of the breakpoint.

  28. What is transition in CSS?

  By using the CSS transition you can change the way in which the transition takes place between the first place to another in a given duration. CSS transition provides you full control to change the property value smoothly.

  29. Explain CSS transform?

  The CSS transform property allows you to transform an element in 2D or 3D effects. It provides you to rotate, scale, skew, move, etc., to the element.

  30. What is pseudo elements?

  CSS pseudo-elements are used to add special style effects to some selectors. By using the pseudo element you can style the line or the first letter of an element and also you can insert content before, or after, the text of an element.