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This is the list of commonly asked Javascript interview questions. So don't forget to prepare and practice them well. Solve this question set to evaluate your answers and get feedback. If you have any doubts, please share them in the comment section, and I will try to clear them up. If you have a good set of questions, you can share them as well, and it will help everyone!
Practice these questions and get feedbacks! It will help you improve your answer.
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1. Explain closures in JavaScript.
2. What is the purpose and usage of the 'this' keyword in JavaScript?
3. Explain the concept of memoization.
4. Can you explain the concept of hoisting in JavaScript?
5. Explain prototypal inheritance in JavaScript.
6. What is the difference between == and === operators?
7. What are event bubbling and event capturing in JavaScript, and how do they work?
8. What are promises in JavaScript, and how do they work?
9. What is the purpose of the 'async/await' keywords?
10. What are higher-order functions in JavaScript, and how do they work?
11. What is the purpose of the 'bind' method in JavaScript, and how is it used?
12. What is the difference between synchronous and asynchronous code in JavaScript?
13. Explain the difference between let, const, and var.
14. What is the difference between null and undefined?
15. What is the difference between 'call' and 'apply' methods?
16. What are arrow functions and how do they differ from regular functions?
17. What is the purpose of the 'use strict' directive in JavaScript?
18. Explain the concept of callback functions.
19. Can you explain the event loop in JavaScript?
20. What various data types are available in JavaScript?