What are the benefits of using Repository pattern?

Short answer: Separation of concerns between business and data access layers Improved testability (can mock repositories) Centralized query logic for maintainability Easier to switch persistence implementations Promotes cleaner and more organized code

Real-world example (ShopNest)

ShopNest payment fees use Strategy: IFeeCalculator with UPI/Card implementations chosen at runtime.

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.