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?

1369

How to create a popup warning box?

1024

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

1054

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

1045

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

993

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

988

How to create an input box?

1198

What is event bubbling in the dom?

1137

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

1054

What is the data type of variables in javascript?

1084

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

1036

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

955

Does javascript have the concept level scope?

1048

What is undefined value means in javascript?

1094

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

1002

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Un-Answered Questions { JavaScript }

What is the purpose of using javascript?

993

How to shift and unshift using javascript?

1048

How we can add title of the page by javascript?

1133

Is javascript object a hash table?

1009

Which javascript is best?

988

What is object freeze?

919

How do I find javascript?

947

Should you use var or let?

1047

Name the two functions that are used to create an HTML element dynamically?

972

Explain the working of timers in javascript?

1104

How many hours learn javascript?

1151

What is the difference between push() and concat() in javascript?

1175

How do we add javascript onto a web page?

998

What are the datatypes in javascript?

951

what is the difference between wrappers and primitives es: diff between int i=200 in primitives and integeri = new integer(54)

2379

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