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?

672

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

736

What is called variable typing in javascript?

710

Does javascript support automatic type conversion?

878

What are the two basic groups of dataypes in javascript?

708

Explain window.onload and ondocumentready?

666

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

692

Explain the role of deferred scripts in javascript?

688

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

858

Is it possible to break javascript code into several lines?

1294

How generic objects can be created?

674

Write about the errors shown in javascript?

644

Define unescape() and escape() functions?

700

Mention what is the disadvantage of using innerhtml in javascript?

792

Explain the for-in loop?

697

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Un-Answered Questions { JavaScript }

What is the difference between ‘var’ and ‘let’ keyword?

699

Where javascript variables are stored?

686

What are the different boolean operators in JavaScript?

666

What is the naming conventions for the variables in javascript?

712

What does it mean in javascript?

730

Explain the working of timers in javascript?

696

Is javascript open source?

616

What does the isNaN() function?

725

Define closure.

679

How to write normal text code using JavaScript dynamically?

677

Why is javascript hoisting?

675

What is JavaScript?

1005

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

716

Explain few difference between null, undefined or undeclared javascript variable?

687

Is JavaScript a case-sensitive language?

718

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