Top 62 JavaScript Interview Questions and Answers

 I have shared the best 62 interview questions and answers based on my working experience. After learning it you will definitely get a  job in a top-level IT company. Each question is most important for freshers as well as experienced developers who want to attend a technical interview.

Here I have given the only top-level javascript interview Question with answers. If you want to get answers then you will have to open the following URL

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Most Important JavaScript Interview Question

This is the top collection of most important javascript interview questions with answers. It will be very helpful for freshers as well as experienced 

1. What is javascript
2. Why we use javascript
3. how many ways to link javascript to HTML
4. What is inline javascript
5. What is internal javascript
6. What is external javascript
7. What is the difference between undefined & Null
8. What is difference between indexof() and search()
9. What is var keyword
10. What is let keyword
11. What is const keyword
12. What is an arrow function
13. What is an anonymous function
14. what is factory function
15. how to add new html element dynamically
16. What is difference between == & ===
17. How to submit the form in javascript
18. How to change className and style property
19. What is the use of void(0) method
20. What are different types of error in javascript
21. What is strict mode and How to enable it
22. What is a for-in Loop
23. What is the forEach()
24. What is the difference between call() and apply()
25. Is the javascript variable case sensitive
26. What is the difference between toString and join()
27. What is DOM
28. What is NaN and isNaN
29. What is noscript tag
30. What is the Closure function
31. What is an immediately invoked function
32. How to create a cookie in javascript

Basic JavaScript Interview Questions for Freshers

This is  basic javascript interview Questions. It is  very useful for freshers.An experienced developer aslo should know these questions

1. Define common methods for javascript output
2. What are the rules for declaring javascript variable
3. How to check the datatype of the javascript variable
4. What is the difference between break & continue
5. What are the differences between pop() & push()
6. What are the differences between shift() & unshift()
7. How to find the string length
8. What are the differences between() splice & slice()
9. What is concat() method
10. What are the ways for javascript comment
11. What is an event

Advanced JavaScript Interview Questions for Experienced

1. What can we do in javascript
2. How to create an object and access it’s properties
3. What are the methods to extract a part of a string
4. What is the difference between array & object
5. What is the scope of variables in javascript
6. What is Hoisting in javascript
7. What is function expression
8. Define common methods to access an HTML element