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

JavaScript Interview Questions

Questions Answers Views Company eMail

What is output of “20” + 20? In javascript?

960

How to trigger a postback on an updatepanel from javascript?

922

How can you to add javascript to a page when performing an asynchronous postback?

859

What is the use of a weakmap object in javascript?

962

How to validate email in javascript?

1013

In javascript what is an argument object?

1 1593

What is the use of a set object in javascript?

947

Is javascript faster than asp script?

1056

What is the requirement of debugging in javascript?

961

Define anonymous function.

957

Are java and javascript same?

994

What is the use of math object in javascript?

958

What is the role of a strict mode in javascript?

990

Define closure.

905

Name the types of functions.

939

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Un-Answered Questions { JavaScript }

How to update a function in javascript?

1108

How are DOM utilized in JavaScript?

1120

Is javascript object oriented?

931

What is the use of ‘debugger’ keyword in javascript code?

880

Are Attributes and Property the same?

1047

What are the advantages of using external javascript?

941

What does undefined value mean in javascript?

1110

Explain event bubbling and event capturing in javascript?

933

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1515

Explain arrow functions?

981

How we can add title of the page by javascript?

1057

What is the difference between client side javascript and server side javascript.

1090

Explain the process of document loading.

982

Do you have to declare variables in javascript?

953

What are the main features of javascript?

1122

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