Beginner, Intermediate, and Advanced Node.js Interview Questions

Node.js has revolutionized web development with its asynchronous, event-driven architecture. This guide covers interview questions for all levels—beginner, intermediate, and advanced—helping candidates prepare for roles that require expertise in Node.js.

Beginner-Level Questions

1. What is Node.js?

Node.js is a runtime environment built on Chrome’s V8 JavaScript engine that allows JavaScript to be executed outside the browser, often used for server-side development.

2. What are the key features of Node.js?

• Asynchronous and Event-Driven
• Single-Threaded
• Cross-Platform
• Fast due to Chrome’s V8 engine
• Uses npm for package management

3. What is npm?

npm (Node Package Manager) is the default package manager for Node.js. It is used for:

• Installing packages.
• Managing dependencies.
• Publishing open-source libraries.

4. What is the difference between Node.js and JavaScript in the browser?