JavaScript Interview Questions

Common JavaScript interview questions

As one of the most in-demand programming languages in the tech industry, JavaScript is a must-know for developers looking to excel in web app development. With a high demand for professionals skilled in JavaScript, it’s important to be prepared for the types of questions that might come up during an interview. Here are the top 10 JavaScript interview questions that you should expect to be asked in an interview.

Securing a position at a top technology company like TCS, Accenture, or IBM is a coveted goal for many job seekers. However, landing a job at one of these firms requires acing a series of technical and non-technical interviews.

To give you an edge in the process, we’ve compiled a list of commonly asked JavaScript interview questions that are likely to come up during interviews at these top companies. Being prepared with answers to these questions can help increase your chances of success.

Please have a look at them.

  1. Can you explain the differences between a class and an object in JavaScript?
  2. How do you optimize the performance of a JavaScript application?
  3. Can you explain the role of the Document Object Model (DOM) in JavaScript?
  4. How do you handle errors and exceptions in JavaScript?
  5. Can you explain the concept of event bubbling and event capturing in JavaScript?
  6. How do you implement asynchronous programming in JavaScript?
  7. Can you explain the difference between a closure and a callback in JavaScript?
  8. How do you use the jQuery library in JavaScript?
  9. Can you explain the concept of hoisting in JavaScript?
  10. How do you use AJAX to make asynchronous HTTP requests in JavaScript?

Having a solid understanding of these concepts and being able to explain them clearly and concisely will help you impress the interviewer and increase your chances of getting the job.