What is the [ApiController] attribute and what benefits it brings?

Short answer: The [ApiController] attribute is used to denote Web API controllers in ASP.NET Core. ✅ Benefits: Automatic model validation Infer [FromBody] / [FromQuery], etc. 400 BadRequest returned automatically if model state is invalid. Improved parameter binding behavior

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.