Top 30 JavaScript Interview Questions For Beginners

Top 30 JavaScript Interview Questions For Beginners

A more demanded programming language than JavaScript does not currently exist and is not expected in the near future. A company of any size and any sphere needs JavaScript specialists, at least to maintain its representation on the Internet. Web development in general is growing and developing very rapidly. But the appearance and usability of an Internet resource is provided by a JavaScript specialist. So, we are sure that the questions below will be useful for 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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