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

JavaScript Interview Questions

Questions Answers Views Company eMail

Is it possible to use javascript to change the meta-tags of the page?

912

How to convert json string to object?

1026

What is object in javascript?

1115

what is the difference between let, var, and const?

1124

What is the difference between undefined and object?

1004

How to create the namespace in javascript?

1034

What is the scope variable in javascript?

1023

What are associative arrays in javascript?

1065

How to show progress bar while loading using ajax call?

1033

What is hoisted in javascript?

984

Which built-in method returns the characters in a string beginning at the specified location?

1045

Is javascript case sensitive language?

1020

What are all the looping structures in javascript?

1083

How to read a cookie using javascript?

1144

What is an asynchronous programming? Why is it important in javascript?

1059

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Un-Answered Questions { JavaScript }

What are the different actions that are performed using javascript?

1074

Explain the different types of pop-up boxes you can create in JavaScript.

971

What is hoisting in javascript?

945

How to create objects in JavaScript?

983

How to validate a form in javascript?

946

How generic objects can be created?

934

What is encodeuri() function?

1054

What is the difference between JavaScript and jscript?

1266

Which companies are using node js?

892

Explain how to read and write a file using javascript?

982

What is console.time() and console.timeend()? What is its syntax, and why is it used?

998

Does javascript care about whitespace?

966

What is the difference between remove() and removeChild()?

1056

Name the two functions that are used to create an HTML element dynamically?

929

How do I link an external javascript file to html?

911

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