Answer
Compiler rewrites async methods into state machines. Await posts continuations to SynchronizationContext or thread pool. Tasks represent operations and manage completion, cancellation, and exceptions. Avoid context capture for performance.
Quick Answer
The compiler transforms an async method into a state machine struct. Each await point is a state. When the awaited task completes, the continuation is posted to the captured SynchronizationContext (or thread pool). The thread is released during the await — no blocking. The async state machine struct avoids heap allocation for common cases.
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SugharaIQ Editorial Team
Verified Answer
This answer has been peer-reviewed by industry experts holding senior engineering roles to ensure technical accuracy and relevance for modern interview standards.
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Source: SugharaIQ