Javascript Interview Questions asked to Fresher

Javascript Interview Questions asked to Fresher

Javascript Interview Questions for Freshers

Javascript interview questions with answers for Freshers

We are providing basic javascript interview questions with answers for freshers.
We will provide advance or more important javascript interview questions with answers for freshers in next post.

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Question: What is JavaScript?
Answer:
JavaScript is a client-side as well as server side scripting language.
JavaScript is also an Object based Programming language.
Web pages are not the only place where JavaScript is used. Many desktop and server programs use JavaScript. Node.js is the best known.

Question: What is the difference between Java and JavaScript?
Answer:
JavaScript(JS) is not similar or related to Java.

Java is a complete programming language.
JavaScript is a coded program that can be introduced to HTML pages

Java is an OOP programming language while Java Script is an OOP scripting language.

Java creates applications that run in a virtual machine or browser while JavaScript code is run on a browser only.

Java code needs to be compiled while JavaScript code are all in text.

Question: What is the use of isNaN function?
Answer:
isNan function returns true if the argument is not a number otherwise it is false.


Question: Which company developed JavaScript?
Answer:
Netscape, the software company.



Question: What is 'this' keyword in JavaScript?
Answer:
'this' keyword refers to the object from where it was called.

Question: What is the use of type of operator?
Answer:
'typeof' is an operator which is used to return a string description of the type of a variable.

Question: Is JavaScript case sensitive?
Answer:
Yes