Interview Preparation

Node.js Interview Questions

Master the most commonly asked interview questions with comprehensive, expert-crafted answers designed to help you succeed.

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Q1

What is Node.js and what is it used for?

Node.js is a JavaScript runtime built on Chrome's V8 engine, allowing JavaScript to run on the server side.

It is event-driven, non-blocking, and designed for building scalable network applications.

Node.js is commonly used for backend APIs, microservices, real-time applications (e.g., chat), and command-line tools.

It uses an event loop to handle asynchronous operations efficiently.

Q2

What is NPM and how is it used?

NPM (Node Package Manager) is the default package manager for Node.js.

It allows developers to install, manage, and share reusable packages and modules.

Common commands include npm init, npm install, npm start, and npm run