2022 – ES6 Interview Questions and Answers

JavaScript interview questions and answers for beginners and professionals provides a list of top mostly asked JavaScript interview questions.

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Questions are

1. Can you give an example for destructuring an object or an array?
2. List out important features of es6?
3. Template Strings
4. Spread Operator
   • Copying an array
   • Concatenating arrays
   • Spreading elements together with an individual element
   • Spreading elements on function calls
   • Spread syntax for object literals
5. Sets
   • Sets: Keys and Values
6. repeat()
7. Default Parameters
8. Arrow function with this
9. Destructing Assignment
10. Generators
    • Implementing Iterables
    • Infinite Data Streams
11. Symbols()
    • Global Symbols
12. Iterator
13. ES6 Template Literals offer a lot of flexibility in generating strings, can you give an example?
14. What is the benefit of using the arrow syntax for a method in a constructor?
15. What are fat arrow functions? When you should not use arrow functions in ES6?
16. How does await and async works in es6?
17. What are the benefits of using arrow function over es5 function?
18. What are the differences between ES6 class and ES5 function constructors?
19. What are the benefits of using spread syntax and how is it different from rest syntax?
20. What are the differences between variables created using let, var or const?
21. What is the difference between for..in and for..of?
22. What is the Temporal Dead Zone in ES6?
23. What is the difference between ES6 Map and WeakMap?
24. How do you swap variables using Destructuring Assignment?
25. What is the output of below spread operator array?
26. What are default values in destructing assignment?

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