ASP.NET Core Middleware & Pipeline

Question 1

What method is used to add middleware to the ASP.NET Core request pipeline?

Accepted Answer

app.UseMiddleware()

Answer

app.UseMiddleware<T>() registers a custom middleware class in the request pipeline.

Question 2

Which interface must a custom middleware class implement to be recognized by ASP.NET Core's IMiddlewareFactory?

Accepted Answer

IMiddleware

Answer

IMiddleware defines the InvokeAsync method that the factory-activated middleware pattern requires.

Question 3

What is the purpose of the 'next' delegate in ASP.NET Core middleware?

Accepted Answer

To call the next middleware in the pipeline

Answer

Calling next(context) passes control to the subsequent middleware component in the pipeline.

Question 4

Which middleware method creates a branch in the pipeline that does NOT rejoin the main pipeline?

Accepted Answer

app.Run()

Answer

app.Run() adds terminal middleware that never calls next, ending the pipeline branch.

Question 5

What does app.Map() do in an ASP.NET Core middleware pipeline?

Accepted Answer

Branches the pipeline based on a URL path match

Answer

app.Map() creates a conditional branch in the pipeline that activates when the request path matches.

ASP.NET Core Practice Test