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Routing & Controllers Flashcards

6 cards from real ASP.NET Core practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 6 Routing & Controllers flashcards as text

  1. What is the role of UseEndpoints() in ASP.NET Core routing?

    Answer: It executes the endpoints matched by UseRouting()

    UseEndpoints() is where endpoint execution happens; UseRouting() does the matching and UseEndpoints() runs the matched handler.

  2. What does [Area("Admin")] attribute do on a controller?

    Answer: Associates the controller with the Admin routing area for URL organization

    [Area] groups controllers into named areas, allowing separate folder structures and route namespaces like /admin/controller/action.

  3. Which method adds conventional MVC routing with a default template in ASP.NET Core?

    Answer: app.MapControllerRoute()

    app.MapControllerRoute() registers a named conventional route with a template like {controller=Home}/{action=Index}/{id?}.

  4. How does [FromQuery] bind action parameters in ASP.NET Core?

    Answer: It reads the value from the URL query string

    [FromQuery] explicitly binds the parameter from the query string portion of the URL (?key=value).

  5. What does calling Problem() helper method return in an ASP.NET Core API controller?

    Answer: An ObjectResult with ProblemDetails payload and appropriate status code

    Problem() creates an RFC 7807 ProblemDetails response body with a status code, conforming to the standard error format for APIs.

  6. Which attribute restricts an action to accept only HTTP POST requests?

    Answer: [HttpPost]

    [HttpPost] constrains the route to match only POST requests, returning 405 Method Not Allowed for other verbs.