21 real Async & Concurrency questions from the C# bank, as asked in Indian campus drives and tech interviews. Every question has a verified answer and an AI-tutor explanation on placd — free to start.
1. What is Task?
Junior
A.the operator that asynchronously suspends a method until an awaitable completes, returning control to the caller without blocking the thread
B.a lightweight awaitable struct returned to avoid a heap allocation when an asynchronous method frequently completes synchronously
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
D.an object representing an asynchronous operation that may be awaited and that carries its completion status and, optionally, a result
2. Which term means: "an object representing an asynchronous operation that may be awaited and that carries its completion status and, optionally, a result"?
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
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
C.Task — an object representing an asynchronous operation that may be awaited and that carries its completion status and, optionally, a result
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
A.the operator that asynchronously suspends a method until an awaitable completes, returning control to the caller without blocking the thread
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
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
D.a lightweight awaitable struct returned to avoid a heap allocation when an asynchronous method frequently completes synchronously
5. Which term means: "the operator that asynchronously suspends a method until an awaitable completes, returning control to the caller without blocking the thread"?
A.Await operator — a lightweight awaitable struct returned to avoid a heap allocation when an asynchronous method frequently completes synchronously
B.Await operator — the operator that asynchronously suspends a method until an awaitable completes, returning control to the caller without blocking the thread
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
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
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
B.a lightweight awaitable struct returned to avoid a heap allocation when an asynchronous method frequently completes synchronously
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
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
8. Which term means: "an asynchronous method with no returnable awaitable, usable only for event handlers, whose exceptions cannot be caught by the caller and crash the process"?
A.Async void method — a lightweight awaitable struct returned to avoid a heap allocation when an asynchronous method frequently completes synchronously
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
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
D.Async void method — an object representing an asynchronous operation that may be awaited and that carries its completion status and, optionally, a result
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
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
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
D.a lightweight awaitable struct returned to avoid a heap allocation when an asynchronous method frequently completes synchronously
11. Which term means: "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"?
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
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
C.ConfigureAwait false — the operator that asynchronously suspends a method until an awaitable completes, returning control to the caller without blocking the thread
D.ConfigureAwait false — a lightweight awaitable struct returned to avoid a heap allocation when an asynchronous method frequently completes synchronously
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
B.the operator that asynchronously suspends a method until an awaitable completes, returning control to the caller without blocking the thread
C.an object representing an asynchronous operation that may be awaited and that carries its completion status and, optionally, a result
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
14. Which term means: "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"?
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
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
C.Synchronous blocking deadlock — an object representing an asynchronous operation that may be awaited and that carries its completion status and, optionally, a result
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
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
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
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
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
17. Which term means: "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"?
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
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
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
D.CancellationToken — a lightweight awaitable struct returned to avoid a heap allocation when an asynchronous method frequently completes synchronously
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
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
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
D.a lightweight awaitable struct returned to avoid a heap allocation when an asynchronous method frequently completes synchronously
20. Which term means: "a lightweight awaitable struct returned to avoid a heap allocation when an asynchronous method frequently completes synchronously"?
A.ValueTask — a lightweight awaitable struct returned to avoid a heap allocation when an asynchronous method frequently completes synchronously
B.ValueTask — an object representing an asynchronous operation that may be awaited and that carries its completion status and, optionally, a result
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
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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