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

JavaScript Interview Questions

Questions Answers Views Company eMail

What is namespacing in javascript and how is it used?

892

What is the method for reading and writing a file in javascript?

926

What is called variable typing in javascript?

939

Does javascript support automatic type conversion?

1074

What are the two basic groups of dataypes in javascript?

990

Explain window.onload and ondocumentready?

879

How to find operating system in the client machine using javascript?

921

Explain the role of deferred scripts in javascript?

903

How can a page be forced to load another page in javascript?

1063

Is it possible to break javascript code into several lines?

1500

How generic objects can be created?

893

Write about the errors shown in javascript?

860

Define unescape() and escape() functions?

917

Mention what is the disadvantage of using innerhtml in javascript?

963

Explain the for-in loop?

871

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Un-Answered Questions { JavaScript }

Write a program in Java to display the IP address of the local and remote machine.

2148

what is a difference of subclass and main class

1739

When would you use var in your declaration and when you wouldn’t?

886

What is the difference between "var" and "let" keywords?

897

What is enum data type?

888

How to create the namespace in javascript?

973

Is javascript frontend or backend?

845

What is the use of the ‘this’ keyword?

966

what are the differences between as2 and as3?

3388

What is the scope variable in javascript?

960

Why do we need npm?

836

Which built-in method returns the character at the specified index?

1179

Difference between the substr() and substring() in JavaScript?

997

What is the difference between test () and exec () methods?

1073

How do you include a comment in javascript?

870

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