Javascript Interview Questions and Answers (2020) - InterviewBit

Javascript Interview Questions and Answers (2020) - InterviewBit

Given the increasing popularity of its usage in mobile app development, desktop app development, and game development; Javascript has emerged as one of the most loved frontend languages. Whether you're a novice coder looking to brush up on your...

Given the increasing popularity of its usage in mobile app development, desktop app development, and game development; Javascript has emerged as one of the most loved frontend languages.

Whether you're a novice coder looking to brush up on your Javascript Fundamentals or an experienced JavaScript developer looking to upgrade your skills, we've got you covered.

Gain Proficiency of this language with this curated list of the most frequently asked basic to advanced javascript coding interview questions and answers.

javascript web-development programming interview-questions

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10 JavaScript Interesting Questions, Output & Explanation. What is JavaScript? Enumerate the differences between Java and JavaScript? What are JavaScript Data Types? What is the use of isNaN function? Between JavaScript and an ASP script, which is faster? What is negative infinity? Is it possible to break JavaScript Code into several lines? Which company developed JavaScript?

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20 Common JavaScript Interview Questions

20 Common JavaScript Interview Questions: What is JavaScript? List some advantages of JavaScript? Should we use internal or external JavaScript? Why WordPress plugins like Autoptimize aggregate JavaScript Code in one file? What is JavaScript Hoisting? Predict the output of the following code? What is JavaScript “Strict Mode”? What are some alternatives to Svelte? What are Self Invoking Functions? What is the difference between “var”, “let”, and “const”? What is the difference between “==” and “===”? Is there any difference between “null” and “undefined” keywords? Differentiate between “function declaration” and “function expression”? What is a Closure? Predict the output of these two functions? Will they return same the output or not? What is NaN? Explain the for-in loop? What is Event Bubbling and Capturing? What is the difference between JavaScript and ECMA Script? How to create a cookie using JavaScript?