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

JavaScript Interview Questions

Questions Answers Views Company eMail

What are self Executing Functions?

1097

Is Javascript a Functional Programming Language?

1082

Difference between the substr() and substring() in JavaScript?

999

Which keyword is used to print the text in the screen?

998

What is Browser Object Model?

919

Basic methods for opening a popup window using javascript?

929

what data type javascript supports?

937

How will you create new object in javascript?

997

How to create a confirmation box?

898

How to toggle display an html element?

1002

What’s a way to append a value to an array?

974

How do you check if a variable is an object

1115

When would you use var in your declaration and when you wouldn’t?

888

What is variable typing in javascript?

1004

What’s relationship between javascript and ecmascript?

986

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Un-Answered Questions { JavaScript }

How to write hello world on the web page?

892

Which javascript is best?

904

What is the Infinity property used for in Javascript?

968

Why is javascript dangerous?

907

In which location cookies are stored on the hard disk?

933

What is null variable?

1106

What are the predefined functions in javascript?

969

What are the benefits of learning javascript?

923

What is the use of blur function?

909

Explain function hoisting in javascript?

857

How javascript variables work?

938

What does 3+4+"7" evaluate to?

827

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

894

Which built-in method returns the index within the calling string object of the first occurrence of the specified value?

1015

How to convert “20” to number in javascript?

951

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