Handling multiple binder source attributes ([FromBody],?

Short answer: [FromQuery], etc.) You cannot bind multiple [FromBody] parameters in a single action. Common sources: [FromBody] — for JSON/XML payloads [FromQuery] — query string [FromRoute] — route values [FromForm] — form fields and file uploads [FromHeader] — HTTP headers

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.