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?

1209

Define unescape() function?

1033

Explain the working of timers in javascript?

1104

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

987

Define escape() function?

947

What are the variable naming conventions in javascript?

1038

How to print a web page using javascript?

1007

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

967

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

1022

How to create a cookie using javascript?

1148

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

1046

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

1369

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

1007

Give an example of closure?

991

What is purpose of onerror event handler in javascript?

974

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Un-Answered Questions { JavaScript }

How to add a new property in existing function javascript?

1009

What is js injection?

959

What is javascript tree shaking?

1031

What are global variables? How are these variable declared and what are the problems associated with using them?

1008

Where do you write javascript?

955

What are JavaScript Data Types?

1050

What is NaN in Javascript?

1097

just for testing

2187

What is javascript? List some data types supported by javascript?

1069

How do you declare in javascript?

925

What does => mean in node js?

1042

How are event handlers utilized in javascript?

1116

What is the role of javascript in html?

988

List the comparison operators supported by javascript?

1005

How to remove duplicates from javascript array?

1062

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