C# Memory Management MCQ Questions with Answers (Latest 2026)

Q1. Which option best describes the GC in C#/.NET?

A. Reference counting only. B. Automatic memory management via generations. C. Manual delete() calls. D. No automation.

Select an answer to check.

Answer: Automatic memory management via generations.

Here, Automatic memory management via generations. is the right choice. Mark-and-sweep with generations. It aligns directly with what the question asks about which option best describes the gc in c#/.net. A quick elimination of partially true options helps confirm it.

Q2. What is the primary purpose of the GC?

A. Manual delete() calls. B. Reference counting only. C. Automatic memory management via generations. D. No automation.

Select an answer to check.

Answer: Automatic memory management via generations.

In this case, Automatic memory management via generations. is correct. Mark-and-sweep with generations. It aligns directly with what the question asks about what is the primary purpose of the gc. A quick elimination of partially true options helps confirm it.

Q3. Which statement about the GC is most accurate?

A. Reference counting only. B. Automatic memory management via generations. C. Manual delete() calls. D. No automation.

Select an answer to check.

Answer: Automatic memory management via generations.

The best option here is Automatic memory management via generations.. Mark-and-sweep with generations. It aligns directly with what the question asks about which statement about the gc is most accurate. A quick elimination of partially true options helps confirm it.

Q4. How is the GC best characterized?

A. Manual delete() calls. B. No automation. C. Reference counting only. D. Automatic memory management via generations.

Select an answer to check.

Answer: Automatic memory management via generations.

For this question, Automatic memory management via generations. is correct. Mark-and-sweep with generations. It aligns directly with what the question asks about how is the gc best characterized. A quick elimination of partially true options helps confirm it.

Q5. Which option best describes generations in C#/.NET?

A. Pure stack only. B. Gen 0, 1, 2 with young-collection bias. C. Single generation only. D. Random generations.

Select an answer to check.

Answer: Gen 0, 1, 2 with young-collection bias.

Gen 0, 1, 2 with young-collection bias. is the correct answer here. Most objects die young. It aligns directly with what the question asks about which option best describes generations in c#/.net. A quick elimination of partially true options helps confirm it.

Q6. What is the primary purpose of generations?

A. Gen 0, 1, 2 with young-collection bias. B. Pure stack only. C. Single generation only. D. Random generations.

Select an answer to check.

Answer: Gen 0, 1, 2 with young-collection bias.

Here, Gen 0, 1, 2 with young-collection bias. is the right choice. Most objects die young. This matches the core idea being tested around what is the primary purpose of generations. A quick elimination of partially true options helps confirm it.

Q7. Which statement about generations is most accurate?

A. Single generation only. B. Gen 0, 1, 2 with young-collection bias. C. Pure stack only. D. Random generations.

Select an answer to check.

Answer: Gen 0, 1, 2 with young-collection bias.

In this case, Gen 0, 1, 2 with young-collection bias. is correct. Most objects die young. This matches the core idea being tested around which statement about generations is most accurate. A quick elimination of partially true options helps confirm it.

Q8. How is generations best characterized?

A. Single generation only. B. Random generations. C. Gen 0, 1, 2 with young-collection bias. D. Pure stack only.

Select an answer to check.

Answer: Gen 0, 1, 2 with young-collection bias.

The best option here is Gen 0, 1, 2 with young-collection bias.. Most objects die young. This matches the core idea being tested around how is generations best characterized. A quick elimination of partially true options helps confirm it.

Q9. Which option best describes LOH in C#/.NET?

A. A native heap. B. A stack region. C. Large Object Heap for objects ≥ ~85KB. D. An OS file mapping.

Select an answer to check.

Answer: Large Object Heap for objects ≥ ~85KB.

For this question, Large Object Heap for objects ≥ ~85KB. is correct. Less frequently compacted. This matches the core idea being tested around which option best describes loh in c#/.net. A quick elimination of partially true options helps confirm it.

Q10. What is the primary purpose of LOH?

A. Large Object Heap for objects ≥ ~85KB. B. A native heap. C. An OS file mapping. D. A stack region.

Select an answer to check.

Answer: Large Object Heap for objects ≥ ~85KB.

Large Object Heap for objects ≥ ~85KB. is the correct answer here. Less frequently compacted. This matches the core idea being tested around what is the primary purpose of loh. A quick elimination of partially true options helps confirm it.

Q11. Which statement about LOH is most accurate?

A. Large Object Heap for objects ≥ ~85KB. B. An OS file mapping. C. A stack region. D. A native heap.

Select an answer to check.

Answer: Large Object Heap for objects ≥ ~85KB.

Here, Large Object Heap for objects ≥ ~85KB. is the right choice. Less frequently compacted. That is exactly the concept behind which statement about loh is most accurate in this context. A quick elimination of partially true options helps confirm it.

Q12. How is LOH best characterized?

A. Large Object Heap for objects ≥ ~85KB. B. A stack region. C. A native heap. D. An OS file mapping.

Select an answer to check.

Answer: Large Object Heap for objects ≥ ~85KB.

In this case, Large Object Heap for objects ≥ ~85KB. is correct. Less frequently compacted. That is exactly the concept behind how is loh best characterized in this context. A quick elimination of partially true options helps confirm it.

Q13. Which option best describes a finalizer in C#/.NET?

A. Cleanup called by GC before reclamation. B. A constructor. C. A static method. D. An interface implementation.

Select an answer to check.

Answer: Cleanup called by GC before reclamation.

The best option here is Cleanup called by GC before reclamation.. Use sparingly; prefer Dispose. That is exactly the concept behind which option best describes a finalizer in c#/.net in this context. A quick elimination of partially true options helps confirm it.

Q14. What is the primary purpose of a finalizer?

A. A static method. B. A constructor. C. Cleanup called by GC before reclamation. D. An interface implementation.

Select an answer to check.

Answer: Cleanup called by GC before reclamation.

For this question, Cleanup called by GC before reclamation. is correct. Use sparingly; prefer Dispose. That is exactly the concept behind what is the primary purpose of a finalizer in this context. A quick elimination of partially true options helps confirm it.

Q15. Which statement about a finalizer is most accurate?

A. An interface implementation. B. Cleanup called by GC before reclamation. C. A constructor. D. A static method.

Select an answer to check.

Answer: Cleanup called by GC before reclamation.

Cleanup called by GC before reclamation. is the correct answer here. Use sparingly; prefer Dispose. That is exactly the concept behind which statement about a finalizer is most accurate in this context. A quick elimination of partially true options helps confirm it.

Q16. How is a finalizer best characterized?

A. An interface implementation. B. Cleanup called by GC before reclamation. C. A static method. D. A constructor.

Select an answer to check.

Answer: Cleanup called by GC before reclamation.

Here, Cleanup called by GC before reclamation. is the right choice. Use sparingly; prefer Dispose. It fits the requirement in the prompt about how is a finalizer best characterized. A quick elimination of partially true options helps confirm it.

Q17. Which option best describes IDisposable in C#/.NET?

A. A delegate type. B. A struct. C. An attribute. D. Interface with Dispose() for deterministic cleanup.

Select an answer to check.

Answer: Interface with Dispose() for deterministic cleanup.

In this case, Interface with Dispose() for deterministic cleanup. is correct. Pair with using statements. It fits the requirement in the prompt about which option best describes idisposable in c#/.net. A quick elimination of partially true options helps confirm it.

Q18. What is the primary purpose of IDisposable?

A. An attribute. B. A delegate type. C. Interface with Dispose() for deterministic cleanup. D. A struct.

Select an answer to check.

Answer: Interface with Dispose() for deterministic cleanup.

The best option here is Interface with Dispose() for deterministic cleanup.. Pair with using statements. It fits the requirement in the prompt about what is the primary purpose of idisposable. A quick elimination of partially true options helps confirm it.

Q19. Which statement about IDisposable is most accurate?

A. An attribute. B. A struct. C. A delegate type. D. Interface with Dispose() for deterministic cleanup.

Select an answer to check.

Answer: Interface with Dispose() for deterministic cleanup.

For this question, Interface with Dispose() for deterministic cleanup. is correct. Pair with using statements. It fits the requirement in the prompt about which statement about idisposable is most accurate. A quick elimination of partially true options helps confirm it.

Q20. How is IDisposable best characterized?

A. A delegate type. B. An attribute. C. A struct. D. Interface with Dispose() for deterministic cleanup.

Select an answer to check.

Answer: Interface with Dispose() for deterministic cleanup.

Interface with Dispose() for deterministic cleanup. is the correct answer here. Pair with using statements. It fits the requirement in the prompt about how is idisposable best characterized. A quick elimination of partially true options helps confirm it.

Q21. Which option best describes using statement in C#/.NET?

A. Ensures Dispose is called when scope exits. B. Try/catch only. C. Lock statement. D. Pure import.

Select an answer to check.

Answer: Ensures Dispose is called when scope exits.

Here, Ensures Dispose is called when scope exits. is the right choice. Idiomatic disposal. This is the most accurate statement for which option best describes using statement in c#/.net. A quick elimination of partially true options helps confirm it.

Q22. What is the primary purpose of using statement?

A. Pure import. B. Lock statement. C. Try/catch only. D. Ensures Dispose is called when scope exits.

Select an answer to check.

Answer: Ensures Dispose is called when scope exits.

In this case, Ensures Dispose is called when scope exits. is correct. Idiomatic disposal. This is the most accurate statement for what is the primary purpose of using statement. A quick elimination of partially true options helps confirm it.

Q23. Which statement about using statement is most accurate?

A. Lock statement. B. Ensures Dispose is called when scope exits. C. Pure import. D. Try/catch only.

Select an answer to check.

Answer: Ensures Dispose is called when scope exits.

The best option here is Ensures Dispose is called when scope exits.. Idiomatic disposal. This is the most accurate statement for which statement about using statement is most accurate. A quick elimination of partially true options helps confirm it.

Q24. How is using statement best characterized?

A. Lock statement. B. Pure import. C. Ensures Dispose is called when scope exits. D. Try/catch only.

Select an answer to check.

Answer: Ensures Dispose is called when scope exits.

For this question, Ensures Dispose is called when scope exits. is correct. Idiomatic disposal. This is the most accurate statement for how is using statement best characterized. A quick elimination of partially true options helps confirm it.

Q25. Which option best describes the dispose pattern in C#/.NET?

A. Standard pattern with Dispose(bool) virtual. B. Empty Dispose only. C. Finalizer-only cleanup. D. No pattern.

Select an answer to check.

Answer: Standard pattern with Dispose(bool) virtual.

Standard pattern with Dispose(bool) virtual. is the correct answer here. Handles managed and unmanaged resources. This is the most accurate statement for which option best describes the dispose pattern in. A quick elimination of partially true options helps confirm it.

Q26. What is the primary purpose of the dispose pattern?

A. No pattern. B. Finalizer-only cleanup. C. Empty Dispose only. D. Standard pattern with Dispose(bool) virtual.

Select an answer to check.

Answer: Standard pattern with Dispose(bool) virtual.

Here, Standard pattern with Dispose(bool) virtual. is the right choice. Handles managed and unmanaged resources. It aligns directly with what the question asks about what is the primary purpose of the dispose. The other options are either incomplete or contextually incorrect.

Q27. Which statement about the dispose pattern is most accurate?

A. Finalizer-only cleanup. B. Standard pattern with Dispose(bool) virtual. C. No pattern. D. Empty Dispose only.

Select an answer to check.

Answer: Standard pattern with Dispose(bool) virtual.

In this case, Standard pattern with Dispose(bool) virtual. is correct. Handles managed and unmanaged resources. It aligns directly with what the question asks about which statement about the dispose pattern is most. The other options are either incomplete or contextually incorrect.

Q28. How is the dispose pattern best characterized?

A. Finalizer-only cleanup. B. No pattern. C. Standard pattern with Dispose(bool) virtual. D. Empty Dispose only.

Select an answer to check.

Answer: Standard pattern with Dispose(bool) virtual.

The best option here is Standard pattern with Dispose(bool) virtual.. Handles managed and unmanaged resources. It aligns directly with what the question asks about how is the dispose pattern best characterized. The other options are either incomplete or contextually incorrect.

Q29. Which option best describes value types vs reference types in C#/.NET?

A. No distinction. B. All types on stack. C. All types on heap. D. Value types live on stack/inline; reference on heap.

Select an answer to check.

Answer: Value types live on stack/inline; reference on heap.

For this question, Value types live on stack/inline; reference on heap. is correct. Affects allocation and copy semantics. It aligns directly with what the question asks about which option best describes value types vs reference. The other options are either incomplete or contextually incorrect.

Q30. What is the primary purpose of value types vs reference types?

A. All types on stack. B. No distinction. C. All types on heap. D. Value types live on stack/inline; reference on heap.

Select an answer to check.

Answer: Value types live on stack/inline; reference on heap.

Value types live on stack/inline; reference on heap. is the correct answer here. Affects allocation and copy semantics. It aligns directly with what the question asks about what is the primary purpose of value types. The other options are either incomplete or contextually incorrect.

Q31. Which statement about value types vs reference types is most accurate?

A. No distinction. B. Value types live on stack/inline; reference on heap. C. All types on heap. D. All types on stack.

Select an answer to check.

Answer: Value types live on stack/inline; reference on heap.

Here, Value types live on stack/inline; reference on heap. is the right choice. Affects allocation and copy semantics. This matches the core idea being tested around which statement about value types vs reference types. The other options are either incomplete or contextually incorrect.

Q32. How is value types vs reference types best characterized?

A. All types on heap. B. No distinction. C. All types on stack. D. Value types live on stack/inline; reference on heap.

Select an answer to check.

Answer: Value types live on stack/inline; reference on heap.

In this case, Value types live on stack/inline; reference on heap. is correct. Affects allocation and copy semantics. This matches the core idea being tested around how is value types vs reference types best. The other options are either incomplete or contextually incorrect.

Q33. Which option best describes boxing in C#/.NET?

A. Static dispatch. B. Wrapping value type in a heap object. C. Cast between two reference types. D. Pure inheritance.

Select an answer to check.

Answer: Wrapping value type in a heap object.

The best option here is Wrapping value type in a heap object.. Allocation; avoid in hot paths. This matches the core idea being tested around which option best describes boxing in c#/.net. The other options are either incomplete or contextually incorrect.

Q34. What is the primary purpose of boxing?

A. Static dispatch. B. Cast between two reference types. C. Pure inheritance. D. Wrapping value type in a heap object.

Select an answer to check.

Answer: Wrapping value type in a heap object.

For this question, Wrapping value type in a heap object. is correct. Allocation; avoid in hot paths. This matches the core idea being tested around what is the primary purpose of boxing. The other options are either incomplete or contextually incorrect.

Q35. Which statement about boxing is most accurate?

A. Cast between two reference types. B. Pure inheritance. C. Wrapping value type in a heap object. D. Static dispatch.

Select an answer to check.

Answer: Wrapping value type in a heap object.

Wrapping value type in a heap object. is the correct answer here. Allocation; avoid in hot paths. This matches the core idea being tested around which statement about boxing is most accurate. The other options are either incomplete or contextually incorrect.

Q36. How is boxing best characterized?

A. Cast between two reference types. B. Pure inheritance. C. Static dispatch. D. Wrapping value type in a heap object.

Select an answer to check.

Answer: Wrapping value type in a heap object.

Here, Wrapping value type in a heap object. is the right choice. Allocation; avoid in hot paths. That is exactly the concept behind how is boxing best characterized in this context. The other options are either incomplete or contextually incorrect.

Q37. Which option best describes unboxing in C#/.NET?

A. A virtual call. B. A reference cast. C. A static cast. D. Extracting value type from boxed object.

Select an answer to check.

Answer: Extracting value type from boxed object.

In this case, Extracting value type from boxed object. is correct. Throws InvalidCastException on mismatch. That is exactly the concept behind which option best describes unboxing in c#/.net in this context. The other options are either incomplete or contextually incorrect.

Q38. What is the primary purpose of unboxing?

A. Extracting value type from boxed object. B. A static cast. C. A reference cast. D. A virtual call.

Select an answer to check.

Answer: Extracting value type from boxed object.

The best option here is Extracting value type from boxed object.. Throws InvalidCastException on mismatch. That is exactly the concept behind what is the primary purpose of unboxing in this context. The other options are either incomplete or contextually incorrect.

Q39. Which statement about unboxing is most accurate?

A. A static cast. B. A virtual call. C. A reference cast. D. Extracting value type from boxed object.

Select an answer to check.

Answer: Extracting value type from boxed object.

For this question, Extracting value type from boxed object. is correct. Throws InvalidCastException on mismatch. That is exactly the concept behind which statement about unboxing is most accurate in this context. The other options are either incomplete or contextually incorrect.

Q40. How is unboxing best characterized?

A. A reference cast. B. A virtual call. C. Extracting value type from boxed object. D. A static cast.

Select an answer to check.

Answer: Extracting value type from boxed object.

Extracting value type from boxed object. is the correct answer here. Throws InvalidCastException on mismatch. That is exactly the concept behind how is unboxing best characterized in this context. The other options are either incomplete or contextually incorrect.

Q41. Which option best describes Span<T> in C#/.NET?

A. Stack-only safe view over contiguous memory. B. A LINQ extension. C. An attribute. D. A heap-only collection.

Select an answer to check.

Answer: Stack-only safe view over contiguous memory.

Here, Stack-only safe view over contiguous memory. is the right choice. Avoids allocation on slices. It fits the requirement in the prompt about which option best describes span<t> in c#/.net. The other options are either incomplete or contextually incorrect.

Q42. What is the primary purpose of Span<T>?

A. A LINQ extension. B. A heap-only collection. C. An attribute. D. Stack-only safe view over contiguous memory.

Select an answer to check.

Answer: Stack-only safe view over contiguous memory.

In this case, Stack-only safe view over contiguous memory. is correct. Avoids allocation on slices. It fits the requirement in the prompt about what is the primary purpose of span<t>. The other options are either incomplete or contextually incorrect.

Q43. Which statement about Span<T> is most accurate?

A. Stack-only safe view over contiguous memory. B. A heap-only collection. C. A LINQ extension. D. An attribute.

Select an answer to check.

Answer: Stack-only safe view over contiguous memory.

The best option here is Stack-only safe view over contiguous memory.. Avoids allocation on slices. It fits the requirement in the prompt about which statement about span<t> is most accurate. The other options are either incomplete or contextually incorrect.

Q44. How is Span<T> best characterized?

A. An attribute. B. Stack-only safe view over contiguous memory. C. A LINQ extension. D. A heap-only collection.

Select an answer to check.

Answer: Stack-only safe view over contiguous memory.

For this question, Stack-only safe view over contiguous memory. is correct. Avoids allocation on slices. It fits the requirement in the prompt about how is span<t> best characterized. The other options are either incomplete or contextually incorrect.

Q45. Which option best describes Memory<T> in C#/.NET?

A. A reflection helper. B. An attribute. C. A subclass of Array. D. Heap-storable representation of contiguous memory.

Select an answer to check.

Answer: Heap-storable representation of contiguous memory.

Heap-storable representation of contiguous memory. is the correct answer here. Pairs with Span via .Span. It fits the requirement in the prompt about which option best describes memory<t> in c#/.net. The other options are either incomplete or contextually incorrect.

Q46. What is the primary purpose of Memory<T>?

A. A subclass of Array. B. A reflection helper. C. Heap-storable representation of contiguous memory. D. An attribute.

Select an answer to check.

Answer: Heap-storable representation of contiguous memory.

Here, Heap-storable representation of contiguous memory. is the right choice. Pairs with Span via .Span. This is the most accurate statement for what is the primary purpose of memory<t>. The other options are either incomplete or contextually incorrect.

Q47. Which statement about Memory<T> is most accurate?

A. Heap-storable representation of contiguous memory. B. An attribute. C. A reflection helper. D. A subclass of Array.

Select an answer to check.

Answer: Heap-storable representation of contiguous memory.

In this case, Heap-storable representation of contiguous memory. is correct. Pairs with Span via .Span. This is the most accurate statement for which statement about memory<t> is most accurate. The other options are either incomplete or contextually incorrect.

Q48. How is Memory<T> best characterized?

A. A reflection helper. B. A subclass of Array. C. Heap-storable representation of contiguous memory. D. An attribute.

Select an answer to check.

Answer: Heap-storable representation of contiguous memory.

The best option here is Heap-storable representation of contiguous memory.. Pairs with Span via .Span. This is the most accurate statement for how is memory<t> best characterized. The other options are either incomplete or contextually incorrect.

Q49. Which option best describes ArrayPool<T> in C#/.NET?

A. A constant pool. B. A LINQ source. C. Reuse arrays to reduce allocations. D. A native pool.

Select an answer to check.

Answer: Reuse arrays to reduce allocations.

For this question, Reuse arrays to reduce allocations. is correct. Rent/Return arrays. This is the most accurate statement for which option best describes arraypool<t> in c#/.net. The other options are either incomplete or contextually incorrect.

Q50. What is the primary purpose of ArrayPool<T>?

A. A LINQ source. B. A native pool. C. Reuse arrays to reduce allocations. D. A constant pool.

Select an answer to check.

Answer: Reuse arrays to reduce allocations.

Reuse arrays to reduce allocations. is the correct answer here. Rent/Return arrays. This is the most accurate statement for what is the primary purpose of arraypool<t>. The other options are either incomplete or contextually incorrect.