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What is Node.js and why is it used?

Coding Now Expert  •  Jun 13, 2026  •  104 views
Node.js is a JavaScript runtime built on Chrome's V8 engine that lets you run JavaScript on the server side.

**Why use it:**
- **Non-blocking I/O** — handles thousands of concurrent requests efficiently
- **Same language** — JavaScript for both frontend and backend
- **npm ecosystem** — 2 million+ packages available
- **Fast** — V8 engine compiles JS to machine code

Perfect for real-time apps, REST APIs, and microservices.
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