How do you install a package globally vs locally?

Short answer: Local Installation (default): Installs the package into the node_modules folder of your current project. npm install lodash ✅ Used when the package is needed as part of your app's code. Global Installation: Installs the package system-wide, making it available in the command line anywhere. npm install -g nodemon ✅ Used for tools/CLI apps like nodemon, eslint, typescript, etc.

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.