Top Front End Developer Interview Questions with Example Answers [2022]

Question Overview: This question is a good way to see how the applicant responds to an unexpected situation. It's a good idea to ask this question if you have a lot of applicants and need to narrow down your list.

Sample Answer: I'm sorry, but I have a family emergency that requires my attention. I'd be happy to reschedule for another time.

What the interviewer is looking for:
• - A willingness to reschedule
• - An explanation of why the applicant needs to postpone
• - A plan for rescheduling

Question Overview: This question gives you insight into the applicant's knowledge of the most common languages used for front end development.

Sample Answer: HTML, CSS, and JavaScript are the three most important languages for front end web development. I use these languages on a daily basis to create web applications and pages.

What the interviewer is looking for:
• - First-hand experience with the 3 languages
• - Knowledge of the most important languages for front end development
• - A list of other languages that the applicant uses

Question Overview: This question tests the applicant's knowledge of the JavaScript language and their ability to spot the difference between two similar operators.

Sample Answer: === is a strict comparison operator that evaluates both operands and returns true if they're equal. == is a loose comparison operator that evaluates both operands and returns true if they're equal. I use === when I'm comparing objects or numbers for equality.

What the interviewer is looking for:
• - A clear explanation of the difference between these two operators
• - An example of when to use each operator
• - Confidence in explaining this technical concept to any audience

Question Overview: This question gives you an idea of whether the applicant is genuinely interested in the position or if they're just applying for any job.

Sample Answer: I've always wanted to visit Amsterdam and I'm excited about the opportunity to work here. I've heard great things about the city and I'm looking forward to exploring it.

What the interviewer is looking for:
• - A genuine interest in the city
• - A desire to work for your company
• - A willingness to relocate to Amsterdam

Question Overview: Front end developers need to stay on top of the latest trends in web design and development. This question gives you insight into how they keep themselves informed about the latest developments in their field.

Sample Answer: I subscribe to several blogs and newsletters that cover the latest developments in web design and development. I also attend conferences and meetups to learn more about the latest trends.

What the interviewer is looking for:
• - A list of resources that the applicant uses to stay up-to-date
• - A history of staying up-to-date with new technologies
• - A willingness to learn new things

Question Overview: This question gives you insight into the applicant's interest in the company and their desire to work there.

Sample Answer: I've been a fan of your company for a long time, and I'm excited to get the chance to work here. I think my skillset will be a great fit for your team.

What the interviewer is looking for:
• - A clear explanation of why the applicant wants to work for your company
• - A clear explanation of how they fit into the company's mission
• - A desire to work for your company

Question Overview: This question gives you an idea of how the applicant handles difficult projects. It also gives you insight into their past work experience and how they've dealt with problems in the past.

Sample Answer: The most challenging project I worked on was a website redesign for a large company. I had to work with a team of developers and designers to create a new design that met all of our client's requirements.

What the interviewer is looking for:
• - A description of the most challenging project
• - How the applicant handled the challenge
• - A description of what they learned from the project

Question Overview: This question tests the applicant's knowledge of the HTTP protocol. It's a basic question that can help you determine whether the person you're interviewing has a solid grasp of the basics of web development.

Sample Answer: The user enters a URL into their browser and the browser sends a request to the server hosting the website. The server then sends back a response that includes the HTML for the page. The browser then renders the page based on this HTML.

What the interviewer is looking for:
• - Detailed explanation of the process
• - Examples of how the applicant uses this knowledge in their work
• - Confidence in explaining this process to any audience

Question Overview: This question gives you an idea of what the applicant is interested in and what they're passionate about. It's a good way to see whether they're interested in the job you're offering.

Sample Answer: I like to code in JavaScript and HTML5. I also enjoy using Bootstrap for web page layouts.

What the interviewer is looking for:
• - A list of the applicant's favorite programming languages
• - Their favorite web frameworks
• - A list of their favorite development tools

Question Overview: This question tests the applicant's knowledge of CSS properties. It's a basic question that helps you determine whether the person you're interviewing has a strong grasp of CSS fundamentals.

Sample Answer: A CSS float tells the browser to put a particular element to the right side or the left side of the container. I use floats when I'm developing a page that dynamically resizes based on the user resolution.

What the interviewer is looking for:
• - A basic definition of CSS float
• - An explanation of how this property works
• - A demonstration of how the applicant uses this property in their code

Question Overview: This question tests the applicant's ability to create a landing page for a hypothetical company. It's a good way to see whether they have the creativity and problem-solving skills to create a functional web page.

Sample Answer: I would create a landing page that shows the hotel discounts and explains how the company works. I would include a prominent call-to-action button that asks users to sign up for their service.

What the interviewer is looking for:
• - A creative design for a landing page
• - A clear explanation of how the applicant would set up the page
• - A list of the features that would be included on the page

Question Overview: This question is a good way to see whether the interviewee understands the company's goals and objectives. It's also a good way to see how well they understand the company's current position in the market.

Sample Answer: The most important metric for our company is revenue. I will contribute to this metric by creating web applications that are easy to use and help our customers find what they're looking for.

What the interviewer is looking for:
• - A thorough understanding of the company's most important metric
• - A clear explanation of how the applicant will contribute to that metric
• - A willingness to work towards that metric

Question Overview: This question tests the applicant's ability to design a data structure that can be used in a variety of situations. This is a good way to see whether they have a strong grasp of how data structures work.

Sample Answer: I would create a binary search tree that can be used to find the minimum value in constant time. I would use this data structure when I'm developing an application that needs to find the lowest value in a large set of data.

What the interviewer is looking for:
• - A well-designed data structure
• - An understanding of how this data structure could be used in a real-world situation
• - A clear explanation of the applicant's design

Question Overview: This question tests the applicant's knowledge of the two most common markup languages used by front end developers.

Sample Answer: HTML is a markup language that's used for displaying content on web pages. XHTML is a stricter version of HTML that's used for displaying content on web pages. I use XHTML when I'm developing a web application that needs to be compatible with older browsers.

What the interviewer is looking for:
• - A clear understanding of the differences between HTML and XHTML
• - Examples of how the applicant uses each language
• - Confidence in explaining this technical concept to any audience

Question Overview: This question tests the applicant's knowledge of databases and their ability to make informed decisions about which one to use for a project.

Sample Answer: I prefer mongo db because it's a NoSQL database that allows me to store data in a flexible way. I can add new fields to a document without worrying about updating the entire database.

What the interviewer is looking for:
• - In-depth knowledge of mongo db
• - Ability to explain how it's different from other databases
• - Examples of how the applicant has used mongo db

Question Overview: This question gives you an idea of how flexible the applicant is. You want to hire someone who is willing to work around your schedule and meet your needs.

Sample Answer: I'm available to meet with you on Tuesdays and Thursdays from 10am to 1pm. I'm also available to work on-site at your office on Mondays and Wednesdays from 10am to 1pm.

What the interviewer is looking for:
• - Availability for meetings
• - Availability for work
• - Availability for training

Question Overview: This question gives you an idea of the applicant's experience with CSS and how they use it in their front end development projects.

Sample Answer: I use CSS to style my web pages and web applications. I've used CSS to change the colors, fonts, and layouts of my projects. I've also used CSS to create a responsive design that adapts to different screen sizes.

What the interviewer is looking for:
• - Examples of CSS work
• - Details of how the applicant uses CSS
• - Ways that the applicant has improved their CSS skills

Question Overview: This is a basic question that gives you insight into the applicant's personality and their professional background.

Sample Answer: I'm a front end developer with five years of experience in web development. I've worked on a variety of projects for clients in the retail, travel, and healthcare industries. I'm passionate about creating great user experiences and have a strong understanding of usability and accessibility standards.

What the interviewer is looking for:
• - A brief introduction to the applicant's professional background
• - A list of relevant skills and experience
• - A summary of the applicant's personality

Question Overview: JavaScript is a programming language that's used to add functionality to web applications. This question tests the applicant's knowledge of the language and their ability to explain how they use it.

Sample Answer: I use JavaScript to add functionality to web pages. I often use it to create a drop-down menu that appears when the user clicks on a button.

What the interviewer is looking for:
• - A clear explanation of how the applicant uses JavaScript
• - Examples of how they've used JavaScript in their previous projects
• - Confidence in explaining how they use JavaScript

Question Overview: This question tests the applicant's knowledge of JavaScript and React. It's a good way to see whether they're familiar with the most popular frameworks and libraries in the industry.

Sample Answer: I used React to create a tree view that shows all the nodes in a tree. When a user clicks on a node, I hide all of its children using React.

What the interviewer is looking for:
• - A correct answer
• - A detailed explanation of how the applicant completed this task
• - Confidence in their answer