JavaScript Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

JavaScript Interview Questions

Questions Answers Views Company eMail

How to get value of an element by class in javascript ?

967

What is console.log() and why it is used?

1083

What is 'use strict'?

981

what are the difference unescape() and escape() functions?

972

What is singleton class in javascript? Explain

984

What is null in javascript?

995

Who introduced javascript?

940

What is console.log()?

949

What is the difference between "var" and "let" keywords?

945

What are the difference between undefined and not defined in javascript?

1006

How can a value be appended to an array?

953

How will you explain closures in javascript? When are they used?

996

What are screen objects?

930

How can javascript codes be hidden from old browsers that don't support javascript?

966

How can the os of the client machine be detected?

907

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Un-Answered Questions { JavaScript }

What are parameters in javascript?

977

How to prevent modification of an object in Javascript?

1174

How do I use an external javascript file?

1022

Why is javascript hoisting?

923

Where do you put javascript in html?

1013

Is javascript the future?

959

How can you create an Array in JavaScript?

1039

How Does Function Hoisting Work in JavaScript?

945

What does polyfill mean?

880

Difference Between JavaScript and ECMAScript?

907

How do you round a value in javascript?

923

What is double exclamation point?

936

What is data types in javascript?

1034

Can I write javascript in notepad?

942

Difference between undefined and undeclared variables?

952

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