What is Mongoose and how is it used?

Short answer: Mongoose is an ODM (Object Data Modeling) library for MongoDB in Node.js. It provides: Schema-based data modeling Validation Middleware (hooks) Easy querying and relationship management You define schemas and models to interact with MongoDB more intuitively.

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.