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

JavaScript Interview Questions

Questions Answers Views Company eMail

What is the difference between let and var?

1072

What are different types of scope chain available in javascript?

927

What is difference between local and global scope in javascript ?

1074

What is output of undefined * 2 in javascript?

970

Explain function hoisting in javascript?

944

What is difference between array.splice() and array.slice() method in javascript?

1063

List some design patterns in javascript?

931

How host objects are different from native objects in javascript?

1047

How to redirect a page to another page in javascript?

1043

What is the difference between ‘let’ and ‘const’?

1123

If you need to hide the javascript code from the older browser versions, how will you perform it?

1011

Have you used any browser for debugging? If yes, how is it done?

937

What is the difference between ‘function declaration’ and ‘function expression’?

1143

What are ‘settimeout()’?

1194

What is javascript hoisting?

1006

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Un-Answered Questions { JavaScript }

What do you mean by script?

919

Explain with an example the use of event handlers in javascript.

1072

How do I open javascript?

1005

Define unescape() and escape() functions?

1002

How to create arrays in javascript?

1021

Can I declare a variable as CONSTANT in JavaScript?

1021

Can array in javascript be extended?

935

What is output of undefined * 2 in javascript?

970

How can I set up my own javascript error handler?

968

Can you use javascript to hack?

930

What does break and continue statements do in javascript?

975

How do I run javascript in chrome?

1053

Is it possible to do 301 redirects in javascript ?

932

What is the use of the ‘this’ keyword?

1049

What is the difference between == and ===? Which one would you use?

1123

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