InProcess vs OutOfProcess hosting?

Short answer: InProcess hosting runs ASP.NET Core app inside the IIS worker process (w3wp.exe), better performance. OutOfProcess hosting runs the app in a separate process, IIS proxies requests to it. InProcess is default in ASP.NET Core 3.0+ for IIS hosting.

Real-world example (ShopNest)

A ShopNest checkout request flows through middleware, hits a minimal API or controller, uses scoped services, and returns ProblemDetails on errors.

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.