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

JavaScript Interview Questions

Questions Answers Views Company eMail

What is the difference between innerhtml and append() in javascript?

1284

How to create a popup warning box?

983

How can you set position of the page (top and left) to 0 using javascript in one line code?

1010

How do you change the style/class on any element?

1006

What does the attribute defer/async do when added to the script tag?

952

Is it possible make a call to server side event of any button using javascript?

943

How to create an input box?

1133

What is event bubbling in the dom?

1073

What does “1?+2+4 Evaluate to? What about 5 + 4 + “3??

1002

What is the data type of variables in javascript?

1019

How do you write an event emitter base class that allows you to add event listeners?

1001

what is the difference between the below two statements:- (1) var myname = "akiii"; (2) myname = "akiii";

904

Does javascript have the concept level scope?

1004

What is undefined value means in javascript?

1058

To put a "close window" link on a page ?

949

Post New JavaScript Questions

Un-Answered Questions { JavaScript }

What close() does in javascript?

949

What is the ‘Strict’ mode in JavaScript and how can it be enabled?

1018

What are the different types of errors in javascript?

958

What are data structures in javascript?

984

Explain a story about javascript performance problems?

931

What are the four basic data structures in javascript?

999

How can you declare a class in javascript?

1164

What javascript method would convert the string “20” to an integer (on the fly) so “20” + 20 = 40?

929

What is shift() method in javascript?

989

Is null === undefined?

912

How do you sort an array in javascript?

1073

Describe javascript and vbscript.

1047

Explain how to detect the operating system on the client machine?

933

How to add html elements dynamically with JavaScript?

974

What is decodeuri() in javascript?

1023

For More Un-Answered { JavaScript } Questions Click Here