C969 ITSW 3225 Software II – Advanced
C
Finals Assessment Review
(Questions & Solutions)
2025
©2025
, Q1. Which of the following best describes the primary benefit of using
a `ValueTask<T>` over a `Task<T>` in advanced asynchronous C
programming?
A. It supports multiple awaiters on the same asynchronous operation.
B. It minimizes allocation overhead when an operation completes
synchronously.
C. It provides enhanced exception handling compared to `Task<T>`.
D. It is exclusively designed for CPU-bound operations.
ANS: B
Rationale: `ValueTask<T>` is used to reduce the allocation overhead of
creating a `Task<T>` when an operation often completes synchronously.
This makes it an attractive option in performance-critical paths.
---
Q2. What is the primary purpose of the `await foreach` syntax
introduced in C 8.0?
A. To iterate over synchronous collections using asynchronous loops.
B. To asynchronously iterate over an `IAsyncEnumerable<T>` sequence.
C. To automatically parallelize iterations over a collection.
D. To convert any enumerable collection into an asynchronous stream.
ANS: B
Rationale: The `await foreach` syntax is used to asynchronously iterate
over an `IAsyncEnumerable<T>`, allowing developers to process data
streams that are produced asynchronously without blocking the calling
thread.
---
Q3. Which of the following advanced C features allows combining
pattern matching with switch expressions for more concise and
©2025
,expressive conditional logic?
A. Null-Coalescing Operator
B. Deconstruction Patterns
C. Type and Property Patterns
D. Dynamic Binding
ANS: C
Rationale: C ’s type and property patterns can be seamlessly integrated
with switch expressions to concisely match objects based on types and
their properties, leading to clearer and more maintainable code.
---
Q4. What is a key advantage of using C 9.0’s `record` types for data
modeling?
A. They disallow inheritance entirely.
B. They provide built-in immutability and value-based equality.
C. They generate dynamic proxies for dependency injection.
D. They support mutable state by default.
ANS: B
Rationale: Records are designed for scenarios involving immutable data
and automatically implement value-based equality, making them ideal
for functional programming paradigms and data transfer objects.
---
Q5. Which mechanism in C allows you to inspect and manipulate type
metadata at runtime?
A. Generics
B. Reflection
C. Dynamic Binding
D. Partial Classes
ANS: B
©2025
, Rationale: Reflection enables runtime type inspection, including
reading metadata, creating instances, and invoking methods dynamically.
This is invaluable for scenarios like dependency injection and
serialization.
---
Q6. To implement dependency inversion and improve testability in
advanced C applications, which of the following techniques is primarily
used?
A. Singleton Pattern
B. Facade Pattern
C. Dependency Injection (DI)
D. Observer Pattern
ANS: C
Rationale: Dependency Injection is the most widespread technique to
adhere to dependency inversion, as it decouples object creation from
object usage, enhancing modularity, testability, and maintainability.
---
Q7. In the context of parallel programming in C , what is the main
benefit provided by the Task Parallel Library (TPL)?
A. It forces sequential execution for easy debugging.
B. It abstracts low‑level thread management for scalable asynchronous
and parallel code.
C. It guarantees that each task runs on a dedicated thread.
D. It eliminates the need for asynchronous programming altogether.
ANS: B
Rationale: The TPL offers high‑level constructs (such as Task,
Parallel.For, and PLINQ) that manage thread pooling and scheduling,
thereby streamlining the development of concurrent operations without
the complexity of manual thread management.
©2025
C
Finals Assessment Review
(Questions & Solutions)
2025
©2025
, Q1. Which of the following best describes the primary benefit of using
a `ValueTask<T>` over a `Task<T>` in advanced asynchronous C
programming?
A. It supports multiple awaiters on the same asynchronous operation.
B. It minimizes allocation overhead when an operation completes
synchronously.
C. It provides enhanced exception handling compared to `Task<T>`.
D. It is exclusively designed for CPU-bound operations.
ANS: B
Rationale: `ValueTask<T>` is used to reduce the allocation overhead of
creating a `Task<T>` when an operation often completes synchronously.
This makes it an attractive option in performance-critical paths.
---
Q2. What is the primary purpose of the `await foreach` syntax
introduced in C 8.0?
A. To iterate over synchronous collections using asynchronous loops.
B. To asynchronously iterate over an `IAsyncEnumerable<T>` sequence.
C. To automatically parallelize iterations over a collection.
D. To convert any enumerable collection into an asynchronous stream.
ANS: B
Rationale: The `await foreach` syntax is used to asynchronously iterate
over an `IAsyncEnumerable<T>`, allowing developers to process data
streams that are produced asynchronously without blocking the calling
thread.
---
Q3. Which of the following advanced C features allows combining
pattern matching with switch expressions for more concise and
©2025
,expressive conditional logic?
A. Null-Coalescing Operator
B. Deconstruction Patterns
C. Type and Property Patterns
D. Dynamic Binding
ANS: C
Rationale: C ’s type and property patterns can be seamlessly integrated
with switch expressions to concisely match objects based on types and
their properties, leading to clearer and more maintainable code.
---
Q4. What is a key advantage of using C 9.0’s `record` types for data
modeling?
A. They disallow inheritance entirely.
B. They provide built-in immutability and value-based equality.
C. They generate dynamic proxies for dependency injection.
D. They support mutable state by default.
ANS: B
Rationale: Records are designed for scenarios involving immutable data
and automatically implement value-based equality, making them ideal
for functional programming paradigms and data transfer objects.
---
Q5. Which mechanism in C allows you to inspect and manipulate type
metadata at runtime?
A. Generics
B. Reflection
C. Dynamic Binding
D. Partial Classes
ANS: B
©2025
, Rationale: Reflection enables runtime type inspection, including
reading metadata, creating instances, and invoking methods dynamically.
This is invaluable for scenarios like dependency injection and
serialization.
---
Q6. To implement dependency inversion and improve testability in
advanced C applications, which of the following techniques is primarily
used?
A. Singleton Pattern
B. Facade Pattern
C. Dependency Injection (DI)
D. Observer Pattern
ANS: C
Rationale: Dependency Injection is the most widespread technique to
adhere to dependency inversion, as it decouples object creation from
object usage, enhancing modularity, testability, and maintainability.
---
Q7. In the context of parallel programming in C , what is the main
benefit provided by the Task Parallel Library (TPL)?
A. It forces sequential execution for easy debugging.
B. It abstracts low‑level thread management for scalable asynchronous
and parallel code.
C. It guarantees that each task runs on a dedicated thread.
D. It eliminates the need for asynchronous programming altogether.
ANS: B
Rationale: The TPL offers high‑level constructs (such as Task,
Parallel.For, and PLINQ) that manage thread pooling and scheduling,
thereby streamlining the development of concurrent operations without
the complexity of manual thread management.
©2025
