With rapid technological advancements, every business seeks experienced individuals to enhance its online presence, whether through strong coding skills or knowledge gained from a free online digital marketing course. Therefore, the need for web developers has grown quickly.
However, the rise in demand also led to increased competition. To stand out in the current competition, you need not just technical skills but also soft skills. One of the easiest ways to get a high-paying web developer job today is to prepare for the most commonly asked web developer interview questions. If you are preparing for web development questions for interview rounds, you must practice both basic and advanced ones.
Here, we have listed the most common web developer interview questions to help you get through the interview for this job profile in top companies seeking experienced individuals.
Most Common Web Development Interview Questions for Freshers
If you are a complete beginner, you can always enroll in a free offline full-stack web development course to learn everything from scratch. Let’s start with beginner-friendly web development questions for interview preparation. Here are some of the most important front end web developer interview questions often asked in entry-level interviews.
Front End Web Developer Interview Questions Examples:
Q1. What are the key responsibilities of a web developer?
Ans. The role of a web developer comes with various responsibilities:
- Create websites using languages like CSS, JavaScript, HTML, and PHP etc.
- Discussions with designers and backend engineers on UI and backend.
- Design, develop, test, debug, and finally deploy web applications.
- Maintaining the overall responsiveness of the website, besides handling the traffic.
- Ensuring the website is updated regularly with new features and bug fixes.
Q2. How do you align an element both vertically and horizontally with CSS?
Ans. One of the most frequently asked HTML CSS JavaScript interview questions is about centering elements. You can easily center an element both vertically (top to bottom) and horizontally (side to side) using CSS. This works whether you’re adding styles directly to the HTML or using style sheets.
One popular way is to use Flexbox, with properties like `justify-content: center` and `align-items: center`. Another way is to use CSS Grid with `place-items: center`. These methods respond well to screen sizes and work with most web browsers. These techniques can help make your web pages look more attractive and professional.
Mastering HTML CSS JavaScript interview questions will help you crack both fresher and experienced roles.
Q3. Explain CORS (Cross-Origin Resource Sharing) and what its importance is?
Ans. CORS – Cross-Origin Resource Sharing enables resources like JavaScript, fonts, and styles on a web page. This mechanism is supported in HTML5, which handles XMLHttpRequest access to a domain slightly differently. CORS is essential for securing cross-origin data transfers and resource sharing between domains. It also requires the server to include specific headers to allow such requests.
Q4. Explain SVG and why it is used?
Ans. SVG, or Scalable Vector Graphics, is an XML-based vector image format perfect for web development because it is infinitely scalable without losing quality. SVG can be used for icons, logos, and even simple illustrations as it is resolution-independent. This makes them look crisp on any screen, regardless of the device.
Another advantage is that SVG files are usually smaller than equivalent PNG or JPEG images. This eventually helps improve page load times. Since SVGs are code-based, we can also style them with CSS and manipulate them with JavaScript. One can change their colors or create interactive elements directly in the markup.
Q5. What is WebPack?
Ans. Webpack is a tool that bundles JavaScript modules, often called a static module bundler. These modules are reusable pieces of code made from your application’s JavaScript, node_modules, images, and CSS styles, packaged for easy integration into your website. When managing many files, Webpack consolidates them into one or a few files that run your application.
When Webpack processes your application or package, it constructs a dependency graph of the modules required for your web app to function correctly. Using this graph, it then generates a new package containing only the necessary files, typically just one or a few bundle.js files that are easy to embed into the HTML and use in the application.
These web developer interview questions for fresher roles build your foundation.
Web Development Interview Questions for Experienced
Check the list of the most asked web development interview questions for experienced professionals. Also note that some full stack web development interview questions also focus on Node.js, APIs, and server-side concepts.
Front End Web Developer Interview Questions Examples:
Q6. What is an event loop in Node JS?
Ans. The event loop allows Node.js to handle non-blocking I/O operations efficiently. Although JavaScript operates on a single thread, the event loop facilitates fast I/O by delegating tasks to the system kernel whenever possible. JavaScript’s runtime model hinges on the event loop, which runs the code, collects and manages events, and executes queued sub-tasks.
Read more – Is Full Stack Developer a Good Career in 2025?
Q7. What’s the difference between local storage and cookies?
Ans. Local storage capacity is usually between 5 and 10 MB, whereas for cookies, it is 4 KB. Clients and servers can read and write cookies, but the client can only access the storage. Since it isn’t session-based, local storage must be cleared manually or through code. In contrast, cookie durations vary depending on the settings for each tab and window.
If you are looking to learn website development then read the ultimate guide to Courses for Website Development for choosing the best courses of India.
Q8. What is the purpose of closures in JavaScript?
Ans. Closures allow inner functions to access variables from their outer (parent) functions even after the parent function has finished executing. This behavior is useful for maintaining state in a private scope, where variables can’t be accessed directly from outside the function, which helps maintain privacy. Additionally, closures are commonly used in callbacks, event handlers, and function factories, enabling more flexible and powerful programming patterns.
Q9. What is ‘Scope’ in JavaScript? Also, tell its different types.
Ans. Scope manages the availability of variables or objects in an application. There are two types of scope in JavaScript:
Global Scope: If a variable has an international scope, it can be accessed from anywhere in the program. Variables declared outside of any function can be accessed anywhere in the program. This scope allows for easy sharing of data across different parts of the code. However, using too many global variables can lead to code that is hard to debug and maintain.
Local Scope: If a variable is locally scoped, it can only be accessed within the function where it is declared. When a variable is declared within a function, it becomes a local variable to that function. These local variables are created when the function starts and are deleted once the function finishes executing.
Read to know more – Learn Full-Stack-Web Development
Q10. What is W3C (World Wide Consortium)
Ans. The W3C is an international standards organization that develops and maintains web standards, including HTML, CSS, and XML. This ensures that websites work consistently across all browsers and devices. Berners-Lee founded the W3C and is famous for creating the World Wide Web.
W3C brings companies, organizations, and developers together to create open standards promoting web interoperability. These standards become crucial for web developers as they provide the foundation for creating websites that work reliably across different browsers.
Final Words
These were the most commonly asked web developer interview questions. Solving problems, coding, and presenting the answers clearly are vital in a web developer interview, and learning additional skills from a free SEO training course can give you an extra edge. These web development interview questions will help you in your interview, whether you are a complete beginner or an experienced professional. This guide of web development questions and answers is designed to help you confidently tackle interviews.
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