Async / await · interview question

Which async practices are recommended? Select all that apply.

Select all that applyMedium

Use `async void` only for event handlers.Call `.Result` on tasks inside ASP.NET Core request code to keep it simple.Pass a `CancellationToken` through async call chains.Use `ConfigureAwait(false)` in general-purpose library code.Wrap I/O-bound calls in `Task.Run` inside controller actions to make them faster.

Answer and explanation

Correct answer

A. Use async void only for event handlers.
C. Pass a CancellationToken through async call chains.
D. Use ConfigureAwait(false) in general-purpose library code.

Why

Async all the way, cancellation tokens, and ConfigureAwait(false) in libraries (which don't need the caller's context) are standard guidance. async void can't be awaited and crashes the process on unhandled exceptions, so reserve it for event handlers.

References

Microsoft Learn: Asynchronous programming with async and await

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