Top 30 JavaScript Interview Questions for Freshers

Top 30 JavaScript Interview Questions For Beginners

A more popular programming language than JavaScript does not exist and is unlikely to appear in the foreseeable future. A company of any size and in any industry requires JavaScript expertise, at the very least, to maintain its Internet presence. Web development, in general, is expanding and evolving at a quick pace. On the other hand, a JavaScript specialist is responsible for the appearance and usefulness of an Internet resource. As a result, we are confident that the questions below will be beneficial to you.

  1. What’s difference between undefined and null?
  2. What does the && operator do?
  3. What does the || operator do?
  4. 4. What is the DOM?
  5. How to evaluate multiple expressions in one line?
  6. What are Higher Order Functions?
  7. What are the falsy values in JavaScript?
  8. What is the usage of Function.prototype.bind?
  9. How to check if a value is an Array?
  10. What is AJAX?
  11. What is NaN? And how to check if a value is NaN?
  12. How many ways can a function be invoked?
  13. What are Arrow functions?
  14. What are Classes?
  15. What are ES6 Modules?
  16. What is a Callback function?
  17. What are Template Literals?
  18. What are Promises?
  19. What does the new keyword do?
  20. Why does typeof null return object? How to check
  21. What is the Negative Infinity in JavaScript?
  22. What do you mean by the prompt box in JavaScript?
  23. What is async/await and how does it work?
  24. What are Wrapper Objects?
  25. What is the difference between Implicit and Explicit Coercion?
  26. What is ECMAScript?
  27. What are the new features in ES6 or ECMAScript 2015?
  28. What’s the difference between var, let and const keywords?
  29. What is the arguments object?
  30. What does “use strict” do?

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