How to mock DbContext or repositories?

Short answer: Mock DbContext using libraries like Moq, but it can be complex due to EF internals. Better to abstract data access via repositories/interfaces, then mock those interfaces in tests. Alternatively, use in-memory or SQLite database for integration tests instead of mocking DbContext. Miscellaneous / Scenario / Trick Questions

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.