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?

951

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

943

How to create an input box?

1131

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?

1018

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?

1002

What is undefined value means in javascript?

1057

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

949

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Un-Answered Questions { JavaScript }

What is the microsoft version of javascript?

1057

Is javascript case sensitive language?

1021

How to make a array as a stack using javascript?

1015

What is push() method in javascript?

952

What does polyfill mean?

880

What is jscript used for?

930

how to write frame work Architecture in QTP

1931

Where can I learn javascript?

960

What does two exclamation marks mean in javascript?

974

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

951

What is foreach loop in javascript?

1009

What is enum in javascript?

1102

What is difference between deep and shallow object coping in javascript?

1041

What are the three core languages in web pages?

1051

How to convert a string to lowercase?

1170

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