Top 25 Essential NodeJS interview questions

Node.js is a platform for web application development on Google Chrome's JavaScript Engine developed by Ryan Dahl on 2009 and running on v0.10.36. NodeJS is a cross-platform, open source runtime environment uses for creating server-side and networking application. It supports Linux, Windows OS and on OSX. The main feature of the Node.js is to provide a JavaScript-based application development platform that is efficient, reliable, stable and faster. NodeJS is not a framework it’s a runtime environment used at the server side.

Node.js = Runtime Environment + JavaScript Library

Node.js provides runtime environment on which a JavaScript based script can execute. This runtime allows executing a JavaScript code on any machine outside a browser based on JVM and this runtime of Node.js, JavaScript is now be executed on the server as well. Node.js supports the library files for various JavaScript modules which help the web development services using the Node.js lot easier.

Are you a MEAN stack developer and have an interview? Don’t worry, just read the top 25 Node.js interview questions we are providing below.

We’ will try our best to keep the answers easy to understand and simple to remember in our next post. All of our questions are developed by experienced developers and have a potential to surface in most Node.js interviews.

you would also need to prepare yourself for AngularJS interview questions as it will be asked in an interview to become a MEAN stack developer. In out next posts, we will come up with the best research answers by our developers

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These are the most important Node.js questions asked in the interviews.
1. What is node.js?

2. How node.js works?

3.What do you mean by the term I/O?

4.What does event-driven programming mean?

5.Where can we use node.js?

6.What is the advantage of using node.js?

7.What are types of API functions in Node.js?

8.What is control flow function?

9.Explain session and cookie in your code?

10.Explain in detail how “Control Flow” controls the functions calls in Node.js?

11.Why is Node.js single threaded?

12.What are callbacks? Why callbacks came into existence?

13.Can you access DOM in node?

14.Using the event loop what are the tasks that should be done asynchronously?

15.Why is node.js quickly gaining attention from JAVA programmers?

16.What are the two arguments that async?queue takes?

17.What is an event loop in Node.js?

18.Mention the steps by which you can A sync in Node.js?

19.What are the pros and cons of Node.js?

20.How Node.js overcomes the problem of blocking of I/O operations?

21.What is the difference between Node.js vs Ajax?

22.Why not just assign a function to properties instead of a prototype for an object?

23.What is the advantage of directives? What role do they play in MVC?

24.How is ‘require’ implemented in Node?

25.Explain the role of middleware in Node?


Summary – Top 25 Node.js Interview Questions.

NodeJS development has increased its practices in last few years and if you will prepare all the Node.js interview questions given above, then you have an advantage in your interview preps and you will add in the Mean stack development league.However, you need to deliver the best answers to these questions which will help you to secure the job.

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we are providing answers in our next post so be patient and we guarantee you will not disappoint and if you have any questions please mention in the comment section.