ASP.NET Core basics · interview question

What does the [ApiController] attribute add to a controller?

Multiple choiceMedium

Automatic HTTP 400 responses when model validation fails, plus binding-source inference such as [FromBody] for complex types.It makes the controller a singleton.It requires every action to be authenticated.It turns on response caching for all actions.

Answer and explanation

Correct answer

A. Automatic HTTP 400 responses when model validation fails, plus binding-source inference such as [FromBody] for complex types.

Why

[ApiController] enables API-friendly conventions: attribute routing requirement, automatic ValidationProblemDetails 400s, binding-source inference and problem-details responses for errors.

References

Microsoft Learn: ASP.NET Core middleware

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