Binding parameters: from body, from query, from route, from form Source Attribute Body [FromBody ] Query string [FromQuer y] Route [FromRout e] Form data [FromForm ] Header [FromHear ]

Short answer: SP.NET Core infers the source when possible.

Real-world example (ShopNest)

ShopNest registers AppDbContext as Scoped and IMemoryCache as Singleton. Putting DbContext in a Singleton causes threading bugs.

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.