Node js interview questions and answers

Are you looking to change your current job in Node.js technology? If your is yes, then you are in right place. Here we are going to share node js interview questions and answers which helps you to crack your next interviews.

Node js Interview Questions and Answers

Below is the list of node js interview questions and answers based on frequently asked in interviews these days.

Q1: What is Node.js?
Node.js is a lightweight server-side scripting programming which is used to build scalable and fast performing web applications.

It is a system independent which can be run on Mac OS, Windows, and Linux with no changes.


Q2: Is Node a single threaded application?
Yes. Node js is a single-threaded web application with the event looping.


Q3: Which types of application developed using Node js?
You can develop Real-time web applications, Network applications, Distributed systems, and General purpose applications using the Node js.


Q4: Is Node.js free to use?
Yes, Node js is free to use under the MIT license.


Q5: How many types of API functions are available in Node.js?
There are two types of API functions in Node.js:

  • Asynchronous, Non-blocking functions
  • Synchronous, Blocking functions

Q6: Is it possible to access DOM in NodeJS?
No, It is not possible to access the DOM in node js application.


Q7: What IDEs Can You Use For Node.Js Development?
There are many IDEs is available for Node js application development. Below is some popular IDEs which used to develop Node js application:

  • Cloud9
  • JetBrains WebStorm
  • JetBrains InteliJ IDEA
  • Komodo IDE
  • Eclipse
  • Atom

Q8: What is REPL In Node.Js?
The full name of REPL is Read Eval Print Loop. Below is explanation of REPL:
READ: It Reads the user input and parses into JavaScript data structure and then stores it in the memory.
EVAL: It Executes the data structure.
PRINT: It Prints the result obtained after evaluating the command.
LOOP: It Loops the above command until the user presses Ctrl+C two times


Q9: How to get post data in Node.Js?
Below code will get the post data:


Q10: How to make post request in Node.Js?


Q11: What is chaining process in Node.Js?
It is an approach to connect with the output of one stream to the input of another stream thus creating a chain of multiple stream operations.

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Prem Tiwari

An engineer by profession and a passionate blogger by heart. Founder of FreeWebMentor.com (A Programming blog for beginners), Tech Speaker at various forums. A part from this he is an open source enthusiast, WordPress Lover, Blogger, SEO, and Growth Strategic.


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