What is process management and why is PM2 useful?

Short answer: Process management means keeping your app running reliably, restarting it if it crashes, and managing multiple instances. PM2 is a popular Node.js process manager that: Restarts apps on crashes or code changes Manages clustering (multi-core usage) Offers logs and monitoring dashboards Supports zero-downtime reloads Run your app with PM2 like this: pm2 start app.js pm2 monit

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.