Concurrency bugs are some of the most expensive defects in production, so senior interviews spend real time here. You will be asked to explain what the compiler generates for async methods, why sync-over-async deadlocks happen, and how to pick the right synchronization primitive.

You will also be asked to design producer-consumer pipelines with backpressure and to shut services down gracefully.

Senior

Async/Await Internals Interview Questions

Ten senior-level questions on C# async/await internals: the compiler state machine, awaiters, SynchronizationContext, ConfigureAwait and ExecutionContext.

10 questions Β· 17 min read

Senior

Thread Synchronization Interview Questions

Senior-level thread synchronization interview questions covering lock, Monitor, the .NET 9 Lock type, SemaphoreSlim, ReaderWriterLockSlim and the memory model.

10 questions Β· 18 min read