ASP.NET MVC interview questions and answers

An attribute calls an action to validate uniqueness like email.

New the controller with mocked dependencies and call the action method.

They store localized strings.

Return Task of IActionResult and await I/O calls.

It renders content only in Dev, Staging, or Production.

Move use cases to application services and keep actions as HTTP adapters.

Use a dedicated EditInput model with only allowed fields.

Cache expensive anonymous fragments and load personal bits separately.

Read the token from a cookie or hidden field and send RequestVerificationToken header.

Add OAuth handlers for Google or Microsoft, store logins in AspNetUserLogins, and link accounts carefully.

I enumerate public routes or content ids and build absolute URLs with LinkGenerator.

Configure session/TempData to Redis for multi-server farms.

Render a view to string with a test host and compare to approved files.

An action filter records Stopwatch around next().

It renders a partial without layout.

Access to the current view’s route data, view data, and writer.

Remove data-val attributes or turn off unobtrusive for the form.

It injects a service into the action signature without constructor noise.

AllowedHosts configuration rejects unknown hosts.

Stable link generation when paths change.