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

JavaScript Interview Questions

Questions Answers Views Company eMail

Which built-in method returns the calling string value converted to lower case?

1157

Define unescape() function?

982

Explain the working of timers in javascript?

1038

Which built-in method reverses the order of the elements of an array?

932

Define escape() function?

905

What are the variable naming conventions in javascript?

982

How to print a web page using javascript?

960

Which built-in method removes the last element from an array and returns that element?

915

Which built-in method returns the length of the string?

965

How to create a cookie using javascript?

1081

Which type of variable among global and local, takes precedence over other if names are same?

972

Which built-in method adds one or more elements to the end of an array and returns the new length of the array?

1319

Which built-in method returns the calling string value converted to upper case?

954

Give an example of closure?

940

What is purpose of onerror event handler in javascript?

922

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Un-Answered Questions { JavaScript }

Can you explain the difference between call and apply?

974

What makes something a function?

938

Which built-in method reverses the order of the elements of an array?

932

In a pop-up browser window, how do you refer to the main browser window that opened it?

880

Which built-in method returns the calling string value converted to lower case?

1157

What is the difference between typeof and instanceof operators in Javascript?

1148

How do I open javascript?

952

Can you explain how inheritance works in javascript?

924

What are different types of inheritence? Which inheritance is followed in javascript.

912

What is the use of a boolean object in javascript?

1018

Will javascript be replaced?

890

What is bom?

897

How you will add function as a property in a javascript object? Give an example.

987

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

946

What are the ways of making comments in javascript?

866

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