JavaScript (originally called Mocha) was developed at Netscape Communications Corporation by Brendan Eich in 1995. It is an object-based scripting language used to develop and manage visually appealing, dynamic, and interactive content such as a carousel (slide show) on web applications. It is used on both the front end/client side and back end/server side. Most of you probably already know all this as you have come to the JavaScript interview questions article. So let’s move on.

JavaScript interview questions

Here’s a list of the most common JavaScript interview questions and their answers:

Question 1: What is the difference between declaring variables using let, var, and const?

Question 2: Differentiate between “=”, “==” and “===” operators?

Question 4: How to assign properties to an object in JavaScript?

Question 6: What is JavaScript hoisting?

Question 7: Difference between pop(), push() and shift(), unshift() methods

Question 8: What is the “this” keyword

Question 9: What are classes in javascript?

Question 10: What will the following code return:

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