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Top 20 Web Development Interview Questions with Answer with 3 to 5 years experienced

Hello guys, if you are preparing for web developer job interview and looking for frequently asked web development interview questions then you have come to the right place.  Earlier, I have not just  shared HTML Interview QuestionCSS Interview Questions, and JavaScript Interview Questions, but also question from popular Frontend frameworks like React and Angular, and in this article, I am going to share common web development interview questions for 3 to 5 years experienced professionals. If you have worked as a web developer or created a couple of web projects then you may know answers of all of these questions but if you struggle to answer them then you can always go back and join any of these best web development courses to learn and revise key web development concepts. 


If you are looking to land a job in the software industry, web development is something that you should definitely have in your toolbox. Basically, web development refers to everything from building, creating, and maintaining websites. 

As a web developer, you should also be proficient in designing, programming, as well as database management. The world of web development can be classified into frontend development and backend development. 

The front end is that part of the website that the user directly interacts with. It is also known as the client-side of the application.

Backend development basically deals with the server-side of a website. Users cannot interact with this part of a website. What this means is that this piece of software does not come in direct contact with the users. In this article, I have shared both frontend and backend interview questions. 

20 Web Development Interview Questions with Answers

It can be tough when you are preparing for an interview. Especially if you really want the job. Trust me, we have all been there. And that is why this article is going to help you massively. The questions in this article will help you master the field of web development and land your dream job. 

1. What is Namespacing in JavaScript?

The namespace basically refers to a container name that can be used for storing classes, functions, and variables. This can also be repeated in other namespaces by invoking the same name without any error.

2. What can you do to reduce page loading time?

You can use any of the following tricks to reduce the loading time of web pages:
  • Reducing the image size
  • Removing unnecessary widgets
  • Avoiding multiple redirects
  • Reducing lookups
  • Checking the current speed of the website
  • Cleaning the web code

3. What can you tell us about CORS?

CORS stands for Cross-Origin Resource Sharing. It is a browser mechanism that can be used for allowing controlled access to resources that are located outside a given domain.

4. What are some of the advantages of using HTTP 2.0?

HTTP 2.0 offer higher loading speeds and automatic prioritization. It can also be used for improving web positioning as well as decreasing broadband consumption and faster presentation.

5. What are some of the new form elements introduced in HTML 5?

Some of the new forms introduced in HTML 5 are:
  • <keygen>, which generates an encryption key
  • <progress>, which heads in the direction of max value
  • <meter>, which displays a general value within a range
  • <output>, which provides an output
  • <datalist>, which specifies a list of options

6. What is the most efficient way to integrate stylesheets into a website?

The best way would be by using just one file named styles.css. You can change the style by scrolling to find the relevant section and modifying the CSS. 

Top 20 Web Development Interview Questions with Answer with 3 to 5 years experienced

7. How can Canvas be used in HTML?

The Canvas element can be used for drawing graphics using JavaScript. It can also be used for drawing graphs, combining photos, and creating basic animations.

8. What is the basic difference between Canvas and SVG?

Canvas is basically an HTML5 element that can be used for drawing graphics quickly with the help of JavaScript. SVG can be used for displaying vector-based graphics on the web.

9. What can you tell us about the default border size in Canvas?

The most important thing to note here is that there is no default border size in Canvas. The border size can be adjusted by modifying CSS.

10. What is your idea of a perfect development environment?

When you answer this question, you should definitely mention that you are flexible enough to work in any environment. You should be able to adapt to any environment by making use of your core skills. 

frontend and backend interview questions with answers

11. What are some of the new APIs provided by HTML5?

The new APIs present on HTML5 is Text track API, Media API, Data transfer API, Application Cache API, User Interaction API, Command API, Constraint Validation API, and History API.

12. What can you tell us about the difference between null value and undefined value in JavaScript?

An undefined value in JavaScript basically means that a variable has been declared but has not yet been assigned a value. In contrast, a null value refers to an assignment value. You need to understand that undefined is a type while null is an object.

13. What are some of the web technologies that you are proficient in?

You should basically have expert skills in HTML5, CSS3, and JavaScript. You should also have some working knowledge of some other technologies like APIs, popular frameworks, and database management.

14. What are the different types of pop-up boxes available in JavaScript?

There are three different types of pop-up boxes available in JavaScript.
The Alert box simply displays a message with an OK button.
The Confirm box shows a confirmation message window with an OK and a Cancel button.
The Prompt box asks for user input followed by confirmation buttons.

JavaScript interview questions for web developers

15. What can you tell us about Scopes in JavaScript? What are the different types of Scopes?

The scope can be used for defining the accessibility of functions and variables that are present in a function. There are two types of scopes:
  • Local - This includes variables that are defined inside a function
  • Global - This includes variables that are defined outside of a function.

16. What mechanism can you use in JavaScript for detecting the operating system on a client machine?

You can use the JavaScript property navigator,appVersion for detecting the operating system on a client machine.

17. Can you use Git for pushing real changes on a website?

Git can be used for streamlining live updates on websites. This can be done by making use of a post-receive hook. You will be able to copy updates from the remote server repository and update them onto the live website. 

Web Development Interview Questions with Answer with 1 to 5 years experienced

18. What are some of the web development tools?

CodeKit can be used for minimizing and combining JavaScript.
GitHub can be used for working together with a team.
CodePen can be used for deploying websites and building test cases.
JS can be used for structuring web applications.
Grunt can be used for automating repetitive tasks.

19. How can you optimize your website's loading time?

You can do this by implementing caching and minifying CSS, HTML, and JavaScript codes.

20. What can you tell us about HTTP/3?

It is the new third-generation HTTP standard that was made available in 2019. It offers a fast, secure, and reliable connection. 


That's all about the popular web development interview questions and answers for people with 3 to 5 years experienced. The questions in this article will help you become an expert web developer and allow you to land your dream software job. If you liked this list of the Top 20 Web Development Interview Questions, feel free to share it with your friends and family. 

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