What are the key features of Node.js?

Short answer: Asynchronous and Event-Driven: Handles multiple requests without blocking. Fast Execution: Powered by the V8 engine. Single-Threaded but Scalable: Uses event loop and callbacks for handling concurrency. Cross-platform: Runs on Windows, Linux, and macOS. NPM (Node Package Manager): Massive ecosystem of reusable packages.

Real-world example (ShopNest)

A ShopNest BFF in Node.js aggregates catalog and price APIs for the React storefront.

Say this in the interview

1. Define — one clear sentence (the short answer above).
2. Example — relate it to a project like ShopNest or your real work.
3. Trade-off — when you would not use it.