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

JavaScript Interview Questions

Questions Answers Views Company eMail

How to achieve inheritance in javascript?

978

How to convert json object to string?

1046

How to open url in a new tab in javascript?

992

How to modify the url of the page without reloading the page?

988

Can you explain the difference between == and ===?

1105

What is "this"?

934

Explain how to write class methods vs. Instance methods.

1009

How do you define a class and its constructor?

975

Explain a story about javascript performance problems?

931

What is a closure and why are they so useful to us?

981

How to convert a string to lowercase?

1170

Explain why asynchronous code is important in javascript?

1027

What is function overloading in javascript?

1055

Can you explain the difference between call and apply?

983

What are two-way data binding and one-way data flow, and how are they different?

1067

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Un-Answered Questions { JavaScript }

List few difference between primitive and non primitive javascript data types?

990

Is there an alternative to javascript?

889

What is unescape() function?

1129

How to make a function in javascript?

929

Does javascript support foreach loop?

997

Difference between private, public and static variable?

1109

Why do we need currying?

864

What is the role of javascript in html?

955

What is noscript tag?

905

What web sites do you feel use javascript most effectively (i.e., Best-in-class examples)? The worst?

934

What is the difference between innerhtml & innertext?

880

What are the four types of javascript objects?

952

Explain javascript debounce function?

1036

Explain unescape() and escape() in javascript?

958

What is object in javascript?

1119

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