Razor Page Handlers (OnGet, OnPost, etc.)?

Short answer: Razor Pages use handler methods: public class IndexModel : PageModel {

Example code

public void OnGet() { ... }
public IActionResult OnPost() { ... }
} You can use asp-page-handler="Update" for custom methods.

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.