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

JavaScript Interview Questions

Questions Answers Views Company eMail

What is difference between deep and shallow object coping in javascript?

984

Explain higher-order functions in javascript?

881

Explain javascript accessors ?

874

Explain arrow functions?

908

Is it possible to do 301 redirects in javascript ?

851

List some unit testing frameworks javascript

903

How to remove duplicates from javascript array?

956

How to remove duplicate values from a javascript array?

941

What are exports and imports?

911

What are different types of inheritence? Which inheritance is followed in javascript.

876

Explain few difference between null, undefined or undeclared javascript variable?

878

List different ways of empty an array in javascript?

830

How to add a new property in existing function javascript?

927

How to encode and decode a url in javascript?

1003

What does the instanceof operator do?

967

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Un-Answered Questions { JavaScript }

Explain why "self" is needed instead of "this".

908

How can javascript be used to improve the "look and feel" of a web site? By the same token, how can javascript be used to improve the user interface?

887

How to delete an array entry using javascript?

865

How to get height and width of different browser in Javascript?

909

Please write the Code of simple javascript calculator withot eval() function

1941

What is the instanceof operator in JavaScript?

923

How do I run javascript on my iphone?

919

Explain prototypal/differential inheritance?

1025

Explain spread operator in javascript?

900

What is null in js?

911

What is the difference between .call() and .apply()?

982

What is foreach loop in javascript?

953

What are different types of scope chain available in javascript?

833

What's the purpose of javascript?

918

How do you write an event emitter base class that allows you to add event listeners?

959

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