What is the migration snapshot and what is its role?

Short answer: A migration snapshot is a C# file (e.g., ModelSnapshot.cs) automatically created by EF Core. It represents the current model state. EF uses it to compare changes in future migrations. Located in the Migrations folder, named like [YourDbContext]ModelSnapshot.cs.

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.