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?

1026

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

1029

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

1116

What is isnan in javascript?

1102

What does the delete operator do?

989

What does undefined value mean in javascript?

1171

How can you detect the client operating system using javascript?

1334

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

1007

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

1156

How to get value from dropdown (select) control?

1104

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

1081

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

948

What is strict mode in javascript?

1121

discuss scoping in javascript?

1002

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

977

Post New JavaScript Questions

Un-Answered Questions { JavaScript }

Explain why asynchronous code is important in javascript?

1072

Where do you put javascript in html?

1097

Is javascript case sensitive language?

1062

Please write the Code of simple javascript calculator withot eval() function

2043

How do I use an external javascript file?

1071

Javascript, Pass by Value or Pass by Reference?

1019

Can you pass a anonymous function as an argument to another function?

1220

What is argument objects in javascript & how to get the type of arguments passed to a function?

1175

Are there any predefined constant provided by the browser with the key code values that can be reused?

956

Is javascript backend or frontend?

924

What applications use javascript?

968

What is the difference between undefined value and null value?

1069

How do I open javascript in browser?

1020

What is the purpose of 'this' operator in JavaScript?

1202

Is javascript server side or client side?

1017

For More Un-Answered { JavaScript } Questions Click Here