How does Unit of Work complement the Repository pattern?

Short answer: The Repository pattern abstracts the data access layer, providing a simplified interface to data operations. The Unit of Work pattern complements it by managing multiple repositories and ensuring that all changes made through these repositories are committed in a single transaction. This combination separates concerns, promotes clean architecture, and maintains transactional integrity across multiple operations.

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.