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

JavaScript Interview Questions

Questions Answers Views Company eMail

What looping structures are there in JavaScript?

Satyam,

2 14600

How do you create a new object in JavaScript?

Satyam,

3 11396

How do you assign object properties?

Satyam,

3 9841

What is a way to append a value to an array?

Satyam,

5 23732

What is this keyword?

Cognizant, Infosys, Satyam,

9 16024

What is the difference between java and java script?

IWW, Wipro,

9 23223

How to prevent a window not to be clicked or selected any way in java script?

2043

What are the methods of validating whether the form is secure?

1 5849

Write sample code for pagination using java script.

3 28747

What is the main difference between Client side JavaScript and and Server side Java Script?

Ramco,

7 21273

How to add a combo box dynamically at run time in Java script?

5 37961

How to go next field without filling the text? Which function should we use?

4 13356

Explain about session? Where it runs & what are different types of session handling?

1 8303

We are facing problem with the compatibilty of IE 7 and IE 6.We are calling a showModal window that is working fine in IE6 but with IE7 it opens a new Window and Data is not getting poputaled.In some pages it Gives an error "The webpage you are viewing is trying to Close the window.Do you want to close this window".

SAP Labs, TCS,

4 10271

Give code Email Checking

3 7656

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Un-Answered Questions { JavaScript }

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

1100

Write a program to reverse a string in pure javascript?

1022

What does the term sticky session mean in a web-farm scenario? Why would you use a sticky session? What is the potential disadvantage of using a sticky session?

984

When do we use JSON.stringify()?

1090

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

977

What is the method for reading and writing a file in javascript?

1010

java pgme for class members hours:minutes:seconds then the constructor expects milliseconds as assignment and initialize data members the members function print hh:mm:ss 90,000 milliseconds passed in constructor then the output is 00:01:30

2003

Is JavaScript a true OOP language?

1109

What is shift() method in javascript?

1030

Why is javascript used for web pages?

1003

What is difference between api and library?

1054

How compare function works javascript?

897

What is scope of variable in javascript?

1051

What are parameters in javascript?

1024

wap to accept an int array frm the user and print the lucky nos.

2215

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