What is Node.js?

Answer:

Node.js is a JavaScript runtime environment built on Chrome’s V8 engine that allows you to run JavaScript on the server-side. It’s designed to be lightweight, fast, and highly scalable, making it ideal for building fast and scalable network applications, such as web servers.

Key Points:

• Node.js is asynchronous and event-driven.
• It is non-blocking, meaning it doesn't wait for operations to complete before moving to the next one.
• It uses a single thread with an event loop, allowing it to handle many requests concurrently.

Example: Node.js can be used for building fast, scalable web servers that handle thousands of requests per second.