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

JavaScript Interview Questions

Questions Answers Views Company eMail

Difference Between JavaScript and ECMAScript?

842

How to prevent modification of an object in Javascript?

1069

How would you compare two objects in JavaScript?

910

What is differential inheritance?

905

How to load another html page from javascript?

910

Javascript, Pass by Value or Pass by Reference?

926

Difference between window, document, and screen in Javascript?

1048

What is Date object in JavaScript?

1014

Why extending array is bad idea?

978

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

973

What are the primitive data types in JavaScript?

976

Entire content of a JavaScript source file in a function block?

999

How to detect the OS on the client machine in JavaScript?

1048

What is the use of blur function in JavaScript?

983

How do you submit a form using JavaScript?

873

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Un-Answered Questions { JavaScript }

What is the difference between undefined and object?

947

Is javascript open source?

811

Can I declare a variable as CONSTANT in JavaScript?

930

Which operator is used to assign a value to a variable?

828

How to add new elements dynamically?

929

Can you run javascript in notepad?

842

How to get value from a textbox?

1063

What is difference between ajax and javascript?

963

How to create a confirmation box?

886

What is closure? Give an example.

952

What is a function in javascript and how does it work?

874

What is an Event Bubbling in Javascript?

981

How to redirect a page to another page in javascript?

919

How can javascript be used to personalize or tailor a web site to fit individual users?

812

What are math constants and functions using javascript?

936

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