Async & Concurrency interview questions

1. A.the operator that asynchronously suspends a method until an awaitable completes, returning control to the caller without blocking the thread
2. B.a lightweight awaitable struct returned to avoid a heap allocation when an asynchronous method frequently completes synchronously
3. C.a struct passed into asynchronous or long-running operations that signals a cooperative request to stop work, observed by polling or by throwing on cancellation
4. D.an object representing an asynchronous operation that may be awaited and that carries its completion status and, optionally, a result

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1. A.Async void method
2. B.Task
3. C.Await operator
4. D.Synchronous blocking deadlock

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1. A.Task — the hang caused by synchronously waiting (for example with .Result or .Wait) on an async operation that needs the captured context the blocked thread is holding
2. B.Task — an asynchronous method with no returnable awaitable, usable only for event handlers, whose exceptions cannot be caught by the caller and crash the process
3. C.Task — an object representing an asynchronous operation that may be awaited and that carries its completion status and, optionally, a result
4. D.Task — a struct passed into asynchronous or long-running operations that signals a cooperative request to stop work, observed by polling or by throwing on cancellation

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1. A.the operator that asynchronously suspends a method until an awaitable completes, returning control to the caller without blocking the thread
2. B.a call applied to an awaitable that tells the continuation not to resume on the original synchronization context, improving performance and avoiding certain deadlocks in libraries
3. C.the hang caused by synchronously waiting (for example with .Result or .Wait) on an async operation that needs the captured context the blocked thread is holding
4. D.a lightweight awaitable struct returned to avoid a heap allocation when an asynchronous method frequently completes synchronously

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1. A.ValueTask
2. B.CancellationToken
3. C.Task
4. D.Await operator

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1. A.Await operator — a lightweight awaitable struct returned to avoid a heap allocation when an asynchronous method frequently completes synchronously
2. B.Await operator — the operator that asynchronously suspends a method until an awaitable completes, returning control to the caller without blocking the thread
3. C.Await operator — a call applied to an awaitable that tells the continuation not to resume on the original synchronization context, improving performance and avoiding certain deadlocks in libraries
4. D.Await operator — a struct passed into asynchronous or long-running operations that signals a cooperative request to stop work, observed by polling or by throwing on cancellation

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1. A.the hang caused by synchronously waiting (for example with .Result or .Wait) on an async operation that needs the captured context the blocked thread is holding
2. B.a lightweight awaitable struct returned to avoid a heap allocation when an asynchronous method frequently completes synchronously
3. C.a struct passed into asynchronous or long-running operations that signals a cooperative request to stop work, observed by polling or by throwing on cancellation
4. D.an asynchronous method with no returnable awaitable, usable only for event handlers, whose exceptions cannot be caught by the caller and crash the process

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1. A.Await operator
2. B.CancellationToken
3. C.Synchronous blocking deadlock
4. D.Async void method

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1. A.Async void method — a lightweight awaitable struct returned to avoid a heap allocation when an asynchronous method frequently completes synchronously
2. B.Async void method — the hang caused by synchronously waiting (for example with .Result or .Wait) on an async operation that needs the captured context the blocked thread is holding
3. C.Async void method — an asynchronous method with no returnable awaitable, usable only for event handlers, whose exceptions cannot be caught by the caller and crash the process
4. D.Async void method — an object representing an asynchronous operation that may be awaited and that carries its completion status and, optionally, a result

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1. A.an asynchronous method with no returnable awaitable, usable only for event handlers, whose exceptions cannot be caught by the caller and crash the process
2. B.the hang caused by synchronously waiting (for example with .Result or .Wait) on an async operation that needs the captured context the blocked thread is holding
3. C.a call applied to an awaitable that tells the continuation not to resume on the original synchronization context, improving performance and avoiding certain deadlocks in libraries
4. D.a lightweight awaitable struct returned to avoid a heap allocation when an asynchronous method frequently completes synchronously

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1. A.ConfigureAwait false
2. B.ValueTask
3. C.Synchronous blocking deadlock
4. D.CancellationToken

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1. A.ConfigureAwait false — a struct passed into asynchronous or long-running operations that signals a cooperative request to stop work, observed by polling or by throwing on cancellation
2. B.ConfigureAwait false — a call applied to an awaitable that tells the continuation not to resume on the original synchronization context, improving performance and avoiding certain deadlocks in libraries
3. C.ConfigureAwait false — the operator that asynchronously suspends a method until an awaitable completes, returning control to the caller without blocking the thread
4. D.ConfigureAwait false — a lightweight awaitable struct returned to avoid a heap allocation when an asynchronous method frequently completes synchronously

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1. A.the hang caused by synchronously waiting (for example with .Result or .Wait) on an async operation that needs the captured context the blocked thread is holding
2. B.the operator that asynchronously suspends a method until an awaitable completes, returning control to the caller without blocking the thread
3. C.an object representing an asynchronous operation that may be awaited and that carries its completion status and, optionally, a result
4. D.a call applied to an awaitable that tells the continuation not to resume on the original synchronization context, improving performance and avoiding certain deadlocks in libraries

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1. A.Synchronous blocking deadlock
2. B.Task
3. C.ValueTask
4. D.Await operator

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1. A.Synchronous blocking deadlock — the hang caused by synchronously waiting (for example with .Result or .Wait) on an async operation that needs the captured context the blocked thread is holding
2. B.Synchronous blocking deadlock — an asynchronous method with no returnable awaitable, usable only for event handlers, whose exceptions cannot be caught by the caller and crash the process
3. C.Synchronous blocking deadlock — an object representing an asynchronous operation that may be awaited and that carries its completion status and, optionally, a result
4. D.Synchronous blocking deadlock — a call applied to an awaitable that tells the continuation not to resume on the original synchronization context, improving performance and avoiding certain deadlocks in libraries

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1. A.an asynchronous method with no returnable awaitable, usable only for event handlers, whose exceptions cannot be caught by the caller and crash the process
2. B.a struct passed into asynchronous or long-running operations that signals a cooperative request to stop work, observed by polling or by throwing on cancellation
3. C.a call applied to an awaitable that tells the continuation not to resume on the original synchronization context, improving performance and avoiding certain deadlocks in libraries
4. D.the hang caused by synchronously waiting (for example with .Result or .Wait) on an async operation that needs the captured context the blocked thread is holding

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1. A.CancellationToken
2. B.Async void method
3. C.Await operator
4. D.ConfigureAwait false

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1. A.CancellationToken — a call applied to an awaitable that tells the continuation not to resume on the original synchronization context, improving performance and avoiding certain deadlocks in libraries
2. B.CancellationToken — an asynchronous method with no returnable awaitable, usable only for event handlers, whose exceptions cannot be caught by the caller and crash the process
3. C.CancellationToken — a struct passed into asynchronous or long-running operations that signals a cooperative request to stop work, observed by polling or by throwing on cancellation
4. D.CancellationToken — a lightweight awaitable struct returned to avoid a heap allocation when an asynchronous method frequently completes synchronously

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1. A.a struct passed into asynchronous or long-running operations that signals a cooperative request to stop work, observed by polling or by throwing on cancellation
2. B.the hang caused by synchronously waiting (for example with .Result or .Wait) on an async operation that needs the captured context the blocked thread is holding
3. C.an asynchronous method with no returnable awaitable, usable only for event handlers, whose exceptions cannot be caught by the caller and crash the process
4. D.a lightweight awaitable struct returned to avoid a heap allocation when an asynchronous method frequently completes synchronously

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1. A.Await operator
2. B.ValueTask
3. C.ConfigureAwait false
4. D.Task

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1. A.ValueTask — a lightweight awaitable struct returned to avoid a heap allocation when an asynchronous method frequently completes synchronously
2. B.ValueTask — an object representing an asynchronous operation that may be awaited and that carries its completion status and, optionally, a result
3. C.ValueTask — an asynchronous method with no returnable awaitable, usable only for event handlers, whose exceptions cannot be caught by the caller and crash the process
4. D.ValueTask — the operator that asynchronously suspends a method until an awaitable completes, returning control to the caller without blocking the thread

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