JavaScript interview questions for developers

JavaScript is the most widely used scripting language. Without the basic knowledge of JavaScript, it is extremely difficult to work with web technologies.

Any front-end interview without JavaScript question is not standard. Following are some useful JavaScript interview questions:

What is scope in JavaScript?

In JavaScript What is hoisting ?

What is closure in JavaScript?

What are the difference between apply, call and bind?

IIFE and when we need it?

What is the type of NaN? How to check a variable is NaN?

How to calculate the length of an associative array in JavaScript?

What is prototypal Inheritance explain with example?

What are the Difference between function expression and function definition?

How to determine two JavaScript objects are equal?