How do you structure your test projects in .NET solutions?

Short answer: Typically, test projects mirror the structure of the production projects, organized by feature or layer. For example, you might have MyApp.Core.Tests, MyApp.Web.Tests, and MyApp.Data.Tests. Tests are grouped by functionality to keep code maintainable and discoverable.

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.