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?

978

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

964

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

1075

What is isnan in javascript?

1045

What does the delete operator do?

936

What does undefined value mean in javascript?

1105

How can you detect the client operating system using javascript?

1244

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

972

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

1108

How to get value from dropdown (select) control?

1059

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

1030

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

904

What is strict mode in javascript?

1055

discuss scoping in javascript?

949

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

922

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Un-Answered Questions { JavaScript }

what is a difference of subclass and main class

1806

What is a global variable in programming?

966

How to accessing elements using javascript?

1028

How are javascript and ecma script related?

942

What is unescape() function?

1129

If 2 methods have same name and same number of parameters, which one will be executed first?

934

What is the use of spread operator?

977

What are the types of variables in javascript?

925

What do you mean by script?

879

What is eval() in javascript?

1075

What does parse Query String return in javascript?

970

How to validate email in javascript?

1009

What is npm repository?

960

What is the disadvantage of using innerhtml in javascript?

1166

How to delete an array entry using javascript?

915

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