Node.js is a Javascript runtime environment that can be deployed on the server side to execute Javascript codes. Node.js can be deployed on Windows, Linux or Mac Systems, thus making it a cross-platform solution. By allowing developers to write Javascript code which can be executed on the Server Side, Node.js provides the advantage of unifying application development using Javascript for both Client-side and Server-side rather than using different languages.
Javascript is a popular language which is used by millions of developers around the world and this makes the learning curve easier to learn Node.js both by Javascript developers and complete beginners. Node.js is one of the most sought out skills with a lucrative salary for developing web applications.
Get prepared with most frequently asked but important interview questions to prepare yourself for this high paying job position. This blog gives you a set of Important Node Js interview Questions and these questions have been compiled to help both freshers and experienced candidates. We wish you all the best for your Interview!!
1. Describe Node.js.
JavaScript code can be executed outside of an online browser using the open-source, cross-platform Node.js runtime environment.
2. What is Node.js used for?
Building robust network apps requires the use of Node.js.
3. Describe NPM.
The Node.js package manager is called npm. It offers a method for managing and distributing the tools (libraries, frameworks) required to create a Node.js application.
4. What in Node.js is an event?
A signal that a computer can watch for and respond to is what Node.js refers to as an event.
5. What does a Node.js return method do?
In Node.js, a callback function is a function that receives input from another function and is called once that function has finished its job.
6. What distinguishes synchronous programming from asynchronous programming?
Tasks are carried out sequentially, one at a time, in synchronous computing. Asynchronous computing allows activities to run concurrently without waiting for one another.
7. In Node.js, what is a promise?
In Node.js, a promise is a tool for managing deferred tasks. It can be used to prevent callback hell and symbolizes the ultimate success (or failure) of an asynchronous action.
8. In Node.js, what’s the distinction between require and import?
In Node.js, importing a module is done with a method called require, whereas in ES6, importing a module is done with a declaration called import.
9. What does Node.js middleware do?
In Node.js, middleware refers to a function or group of functions that the Express.js transport layer calls before invoking the actual request manager.
10. In Node.js, what is a stream?
In Node.js, a stream is a constant data movement. Instead of putting the complete data set into memory, it enables you to access or send data in small segments.
11. What is Express.js, exactly?
A well-liked online application platform for Node.js is called Express.js. It offers a selection of tools for creating web apps, including middleware, routing, and scripting.
12. What does the Node.js cluster module serve?
By allowing Node.js apps to employ all available CPU cores, the Node.js cluster module enhances speed.
13. What distinguishes the HTTP PUT and POST methods?
Existing resources are updated using the PUT method, while new resources are created using the POST method.
14. What distinguishes the HTTP GET and POST methods?
While the POST method is used to send data for server processing, the GET method is used to obtain resources.
15. How do REST and SOAP vary from one another?
While SOAP is a protocol used in the application of web services, REST is a lightweight design approach for creating distributed systems.
Node.js Interview Questions and Answers for beginners and experts. List of frequently asked interview questions on node js. We hope these Node.js Interview Questions and Answers are useful and will help you to get the best job in the networking industry. This Node.js interview questions and answers are prepared by Node.js Professionals based on MNC Companies’ expectations. Stay tuned we will update New Node.js Interview questions with Answers Frequently.
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