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?

925

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

907

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

1013

What is isnan in javascript?

983

What does the delete operator do?

902

What does undefined value mean in javascript?

1039

How can you detect the client operating system using javascript?

1149

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

940

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

1054

How to get value from dropdown (select) control?

1017

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

972

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

858

What is strict mode in javascript?

992

discuss scoping in javascript?

897

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

877

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Un-Answered Questions { JavaScript }

What are the various functional components in javascript?

905

What are the advantages of using external javascript?

905

Is there any class in javascript?

975

What is the data type of variables of in javascript?

920

What is lambda in programming?

908

What is createtextnode?

859

What is encodeuri() function?

1008

What is the use of isNaN function?

895

Write a program to exaplain the deferred scripts using event handlers in javascript.

860

Why javascript is fast?

881

What is the difference between sessionstate and viewstate?

894

What is the output of 10+20+”30″ in JavaScript?

1183

Is javascript whitespace sensitive?

950

What is a reverse string?

964

Explain event bubbling and event capturing in javascript?

878

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