CSS Interview Questions and Answers: Top 37 (2022)
When interviewing for a CSS (Cascading Style Sheets) web development position, preparation is crucial. Because things evolve in web development, you should be up to date on current stylistic guidelines. Even if you have extensive programming experience, reviewing your CSS abilities before to the interview will be advantageous. CSS Interview Questions
In this essay, we will look at common CSS interview questions and present sample answers to help you create your own.
These questions can help the interviewer assess your core understanding of CSS:
- Could you explain CSS and where it comes from?
- Do you know who is in charge of CSS standards?
- Tell us about the many CSS versions.
- List the primary advantages of using CSS.
- Which CSS limitations should programmers be aware of?
- What are the three methods for including CSS on a web page?
- Determine the components of a CSS style.
- Explain what CSS frameworks are.
- How do you center block items with CSS?
- What is a rule set, and when should you use one?
CSS knowledge and background inquiries
By asking the following questions, the interviewer can assess your working understanding of CSS and decide if you have the programming skills required.
- Explain the benefits and drawbacks of external style sheets.
- Explain what pseudo-elements are.
- What exactly is the CSS box model and what do its components consist of?
- Which property should we use to manage the background image’s location?
- Explain a descendant selector.
- Explain a universal selector.
- Which browser support tools do you use?
- Explain the difference between Flexbox and CSS grid.
- Explain the distinction between web-safe and fallback fonts.
- How do you specify the dimensions of an element?
To assess your CSS knowledge, the interviewer may ask you the following questions:
- What are the benefits of using CSS preprocessors?
- What precisely are Image Sprites, and why are they useful in CSS?
- Describe how to use media queries on mobile devices.
- What are the specificity guidelines?
- What is the difference between grouping and nesting?
- What is the Z-index function, and how does it work?
- What are your thoughts on the use of additional style sheets?
- What are your thoughts on CSS tweening?
- To connect the external style sheet, what syntax should be used?
Examples of CSS interview questions and answers
- The following are some of the most often asked CSS interview questions and their responses.
- What’s the difference between CSS and CSS3?
- What are the advantages of using CSS instead than HTML?
- What is a CSS selector, exactly?
- Distinguish between inline, embedded, and external style sheets.
- What do you think about responsive web design?
- What do you know about aging gracefully?
- What do you think about gradual enhancement?
- What is file splitting exactly, and why is it useful?
1. What’s the difference between CSS and CSS3?
This is a common question used to assess your understanding of CSS foundations as well as your ability to keep up with industry developments. Your response will show the interviewer that you are up to date on the most recent version of CSS. You can give various examples of how the two vary.
Example: “Among the distinctions are the following:
- CSS is the original and basic version, whereas CSS3 is the modern and improved version.
- CSS is incompatible with CSS3, yet CSS3 is backward compatible with CSS.
- CSS, on the other hand, can be separated into modules.
- CSS does not support media queries, but CSS3 does in the case of responsive webpages.
- Many modern browsers may not implement CSS, however CSS3 may.”
2. What are the advantages of using CSS over HTML?
The purpose of this quiz is to examine your understanding of CSS and HTML. The interviewer wants to know if you know how to use CSS to style HTML text. To respond, explain the distinction between CSS and HTML, as well as the advantages of using CSS.
Example: “CSS can be used to get more control over the design of a website’s layout, whereas HTML is used for page content. I’ve discovered that using a separate CSS sheet rather than adding CSS code to HTML makes it easier to implement style changes on the website. Instead of altering many codes, I only need to modify a single CSS sheet.”
3. Exactly what is a CSS selector?
Understanding CSS selectors is essential in web development since you will frequently need to choose certain material to design with. This question is being asked by the interviewer to check if you can make the necessary changes to the content using CSS selectors. You can respond by clarifying what a selector is and the various types.
Example: “A CSS selector is an element pattern that tells the browser which HTML elements should have CSS property values applied to them. If I need to select a specific material and make changes to it, I can do so using a CSS selector. The CSS selectors specification defines selectors, and browser support is required for them to work. CSS selectors are divided into four types: CSS Class Selector, CSS Universal Selector, CSS ID Selector, and CSS Group Selector.”
4. Distinguish between inline, embedded, and external style sheets.
This question is typically asked in CSS interviews to determine whether applicants understand the fundamentals of CSS. Your response should show the interviewer that you understand how to style HTML code using style sheets. When would you put each of these style sheets to use?
Example: “I use inline, embedded, and external style sheets to style the HTML code. To style short sections of code, I use inline style sheets. To set the overall look of the HTML content, I utilize embedded style sheets and add them between the head tags. To apply a style to the entire website, I use external style sheets.”
5. What is your understanding of responsive web design?
Given the growing importance of having websites that are accessible on a number of devices, this is an important question to ask during a CSS interview. Mention how responsive design enables users to view websites on a wide range of devices.
Example: “Responsive web design is the process of creating websites that automatically expand, shrink, and resize in response to the size and orientation of the user’s device. A website with adaptable web design can adjust to your device, whether it’s a desktop computer, laptop, tablet, or smartphone. In my CSS development work, I typically use responsive design since it provides an excellent user experience across a wide range of devices and increases traffic to the website.”
6. Are you familiar with gentle degradation?
This is a common question used by interviewers to measure your abilities to improve user experience. Your response will demonstrate to them that you understand the significance of browser compatibility while developing websites. Give a brief outline of your knowledge of gentle degradation.
Example: “The technique of building a website that is compatible with the most modern browsers while yet staying functional to some extent on smaller displays and older browsers is known as graceful degradation. Because many of our readers still use older browsers and it is vital that they can access and view our website, I use the concept of gradual degradation in my web development job.”
7. How well do you comprehend the concept of progressive enhancement?
This question is asked by the interviewer to evaluate if you know how to give a nice user experience regardless of the browser. Your response should show that you understand the importance of creating essential stuff first. Mention that the website will add functionality based on the capabilities of the user’s browser.
Example: “**Progressive enhancement is a web development strategy that prioritizes producing core webpage content to provide a positive user experience. If the browser allows it, the website will gradually add functionality to the page in order to improve the user experience. If the browser does not allow upgrades, the user will still be able to access the basic website functions. I used the concept of progressive enhancement on the last two websites I worked on.”
8. What is file splitting exactly, and why is it useful?
Because file splitting affects the user experience, CSS developers must grasp it. Your response should show the interviewer that you are familiar with CSS file management. Discuss how file splitting can reduce the amount of time it takes for a website to load.
Example: “To improve CSS administration, file splitting includes dividing the CSS code into multiple files and organizing them by component type or site part. To make things easier, create and assign a separate style sheet to each of these files. As a result, when someone visits a specific section of the website, only that section’s style sheets are loaded. Other website parts’ style sheets will not be loaded until they are required. This, I’ve noticed, reduces the amount of time it takes for the page to load in the browser, resulting in faster website access and a better user experience.”