ASP.NET Core Routing & Controllers 3

Question 1

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

Accepted Answer

It executes the endpoints matched by UseRouting()

Answer

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

Question 2

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

Accepted Answer

Associates the controller with the Admin routing area for URL organization

Answer

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

Question 3

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

Accepted Answer

app.MapControllerRoute()

Answer

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

Question 4

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

Accepted Answer

It reads the value from the URL query string

Answer

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

Question 5

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

Accepted Answer

An ObjectResult with ProblemDetails payload and appropriate status code

Answer

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

ASP.NET Core Practice Test