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

JavaScript Interview Questions

Questions Answers Views Company eMail

what does javascript null mean?

919

How would you check if a variable is null/undefined?

898

How to get the contents of an input box using javascript?

1003

What is isnan in javascript?

974

What does the delete operator do?

893

What does undefined value mean in javascript?

1028

How can you detect the client operating system using javascript?

1137

What is unobtrusive javascript? How to add behavior to an element using javascript?

932

Write a way by which you can do something on the close of the window ?

1046

How to get value from dropdown (select) control?

1010

How to hide javascript code from old browsers that dont run it?

963

How to force a page to go to another page using javascript ?

852

What is strict mode in javascript?

979

discuss scoping in javascript?

891

What is the concept of “functions as objects” and how does this affect variable scope?

865

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Un-Answered Questions { JavaScript }

How host objects are different from native objects in javascript?

958

Is jquery easier than javascript?

840

What is the use of a weakmap object in javascript?

903

Is javascript or python easier?

874

What is require in javascript?

1009

Is javascript hard to learn?

839

Who created npm?

873

How to convert javascript date to iso standard?

977

How do you trim in javascript?

882

How is javascript different from java?

1043

What is the difference between undefined and not defined in JavaScript?

940

Between JavaScript and an ASP script, which is faster?

1090

What is namespacing in javascript and how is it used?

883

Is javascript object oriented?

869

Explain how to read and write a file using javascript?

921

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