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JavaScript Interview Questions and Answers
Chapter 1: Basics
20 questions
Section 1
Q.
What is JavaScript? What is the role of JavaScript engine?
Q.
What are client side and server side?
Q.
What are variables? What is the difference between var, let, and const?
Q.
What are some important string operations in JS?
Q.
What is DOM? What is the difference between HTML and DOM?
Q.
What are selectors in JS?
Q.
What is the difference between getElementById, getElementsByClassName and getElementsByTagName?
Q.
What are data types in JS?
Q.
What are operators? What are the types of operators in JS?
Q.
What are the types of conditions statements in JS?
Q.
What is a loop? What are the types of loops in JS?
Q.
What are Functions in JS? What are the types of function?
Q.
What are Arrow Functions in JS? What is it use?
Q.
What are Arrays in JS? How to get, add & remove elements from arrays?
Q.
What are Objects in JS?
Q.
What is Scope in JavaScript?
Q.
What is Hoisting in JavaScript?
Q.
What is Error Handling in JS?
Q.
What is JSON?
Q.
What is asynchronous programming in JS? What is its use?
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