C# Generics MCQ Questions with Answers – Page 2 (Latest 2026)

Q51. Which statement about Dictionary<TKey,TValue> is most accurate?

A. A queue. B. A linked list. C. A list of tuples only. D. Hash map from key to value.

Select an answer to check.

Answer: Hash map from key to value.

Here, Hash map from key to value. is the right choice. Average O(1) operations. It aligns directly with what the question asks about which statement about dictionary<tkey,tvalue> is most accurate. Competing choices sound plausible, but they miss the key condition.

Q52. How is Dictionary<TKey,TValue> best characterized?

A. A linked list. B. A queue. C. A list of tuples only. D. Hash map from key to value.

Select an answer to check.

Answer: Hash map from key to value.

In this case, Hash map from key to value. is correct. Average O(1) operations. It aligns directly with what the question asks about how is dictionary<tkey,tvalue> best characterized. Competing choices sound plausible, but they miss the key condition.

Q53. Which option best describes HashSet<T> in C#/.NET?

A. A sorted dictionary. B. A list. C. A linked list. D. Set with average O(1) contains/add/remove.

Select an answer to check.

Answer: Set with average O(1) contains/add/remove.

The best option here is Set with average O(1) contains/add/remove.. Stores unique items. It aligns directly with what the question asks about which option best describes hashset<t> in c#/.net. Competing choices sound plausible, but they miss the key condition.

Q54. What is the primary purpose of HashSet<T>?

A. A sorted dictionary. B. A linked list. C. Set with average O(1) contains/add/remove. D. A list.

Select an answer to check.

Answer: Set with average O(1) contains/add/remove.

For this question, Set with average O(1) contains/add/remove. is correct. Stores unique items. It aligns directly with what the question asks about what is the primary purpose of hashset<t>. Competing choices sound plausible, but they miss the key condition.

Q55. Which statement about HashSet<T> is most accurate?

A. A sorted dictionary. B. Set with average O(1) contains/add/remove. C. A list. D. A linked list.

Select an answer to check.

Answer: Set with average O(1) contains/add/remove.

Set with average O(1) contains/add/remove. is the correct answer here. Stores unique items. It aligns directly with what the question asks about which statement about hashset<t> is most accurate. Competing choices sound plausible, but they miss the key condition.

Q56. How is HashSet<T> best characterized?

A. A list. B. A sorted dictionary. C. A linked list. D. Set with average O(1) contains/add/remove.

Select an answer to check.

Answer: Set with average O(1) contains/add/remove.

Here, Set with average O(1) contains/add/remove. is the right choice. Stores unique items. This matches the core idea being tested around how is hashset<t> best characterized. Competing choices sound plausible, but they miss the key condition.

Q57. Which option best describes Queue<T> in C#/.NET?

A. Dictionary. B. LIFO stack. C. FIFO collection of T. D. Sorted set.

Select an answer to check.

Answer: FIFO collection of T.

In this case, FIFO collection of T. is correct. Enqueue/Dequeue. This matches the core idea being tested around which option best describes queue<t> in c#/.net. Competing choices sound plausible, but they miss the key condition.

Q58. What is the primary purpose of Queue<T>?

A. FIFO collection of T. B. Dictionary. C. Sorted set. D. LIFO stack.

Select an answer to check.

Answer: FIFO collection of T.

The best option here is FIFO collection of T.. Enqueue/Dequeue. This matches the core idea being tested around what is the primary purpose of queue<t>. Competing choices sound plausible, but they miss the key condition.

Q59. Which statement about Queue<T> is most accurate?

A. Sorted set. B. FIFO collection of T. C. LIFO stack. D. Dictionary.

Select an answer to check.

Answer: FIFO collection of T.

For this question, FIFO collection of T. is correct. Enqueue/Dequeue. This matches the core idea being tested around which statement about queue<t> is most accurate. Competing choices sound plausible, but they miss the key condition.

Q60. How is Queue<T> best characterized?

A. FIFO collection of T. B. Dictionary. C. LIFO stack. D. Sorted set.

Select an answer to check.

Answer: FIFO collection of T.

FIFO collection of T. is the correct answer here. Enqueue/Dequeue. This matches the core idea being tested around how is queue<t> best characterized. Competing choices sound plausible, but they miss the key condition.

Q61. Which option best describes Stack<T> in C#/.NET?

A. FIFO queue. B. Sorted set. C. LIFO collection of T. D. Dictionary.

Select an answer to check.

Answer: LIFO collection of T.

Here, LIFO collection of T. is the right choice. Push/Pop. That is exactly the concept behind which option best describes stack<t> in c#/.net in this context. Competing choices sound plausible, but they miss the key condition.

Q62. What is the primary purpose of Stack<T>?

A. LIFO collection of T. B. Sorted set. C. FIFO queue. D. Dictionary.

Select an answer to check.

Answer: LIFO collection of T.

In this case, LIFO collection of T. is correct. Push/Pop. That is exactly the concept behind what is the primary purpose of stack<t> in this context. Competing choices sound plausible, but they miss the key condition.

Q63. Which statement about Stack<T> is most accurate?

A. LIFO collection of T. B. Sorted set. C. Dictionary. D. FIFO queue.

Select an answer to check.

Answer: LIFO collection of T.

The best option here is LIFO collection of T.. Push/Pop. That is exactly the concept behind which statement about stack<t> is most accurate in this context. Competing choices sound plausible, but they miss the key condition.

Q64. How is Stack<T> best characterized?

A. Sorted set. B. LIFO collection of T. C. Dictionary. D. FIFO queue.

Select an answer to check.

Answer: LIFO collection of T.

For this question, LIFO collection of T. is correct. Push/Pop. That is exactly the concept behind how is stack<t> best characterized in this context. Competing choices sound plausible, but they miss the key condition.

Q65. Which option best describes SortedDictionary<TKey,TValue> in C#/.NET?

A. Set. B. Tree-based sorted map. C. Linked list. D. Hash map only.

Select an answer to check.

Answer: Tree-based sorted map.

Tree-based sorted map. is the correct answer here. O(log n) operations. That is exactly the concept behind which option best describes sorteddictionary<tkey,tvalue> in c#/.net in this context. Competing choices sound plausible, but they miss the key condition.

Q66. What is the primary purpose of SortedDictionary<TKey,TValue>?

A. Hash map only. B. Set. C. Linked list. D. Tree-based sorted map.

Select an answer to check.

Answer: Tree-based sorted map.

Here, Tree-based sorted map. is the right choice. O(log n) operations. It fits the requirement in the prompt about what is the primary purpose of sorteddictionary<tkey,tvalue>. Competing choices sound plausible, but they miss the key condition.

Q67. Which statement about SortedDictionary<TKey,TValue> is most accurate?

A. Tree-based sorted map. B. Set. C. Linked list. D. Hash map only.

Select an answer to check.

Answer: Tree-based sorted map.

In this case, Tree-based sorted map. is correct. O(log n) operations. It fits the requirement in the prompt about which statement about sorteddictionary<tkey,tvalue> is most accurate. Competing choices sound plausible, but they miss the key condition.

Q68. How is SortedDictionary<TKey,TValue> best characterized?

A. Tree-based sorted map. B. Set. C. Hash map only. D. Linked list.

Select an answer to check.

Answer: Tree-based sorted map.

The best option here is Tree-based sorted map.. O(log n) operations. It fits the requirement in the prompt about how is sorteddictionary<tkey,tvalue> best characterized. Competing choices sound plausible, but they miss the key condition.

Q69. Which option best describes ImmutableList<T> in C#/.NET?

A. Immutable list returning new instance on change. B. Mutable list. C. Stack. D. Concurrent dictionary.

Select an answer to check.

Answer: Immutable list returning new instance on change.

For this question, Immutable list returning new instance on change. is correct. Thread-safe by immutability. It fits the requirement in the prompt about which option best describes immutablelist<t> in c#/.net. Competing choices sound plausible, but they miss the key condition.

Q70. What is the primary purpose of ImmutableList<T>?

A. Stack. B. Immutable list returning new instance on change. C. Mutable list. D. Concurrent dictionary.

Select an answer to check.

Answer: Immutable list returning new instance on change.

Immutable list returning new instance on change. is the correct answer here. Thread-safe by immutability. It fits the requirement in the prompt about what is the primary purpose of immutablelist<t>. Competing choices sound plausible, but they miss the key condition.

Q71. Which statement about ImmutableList<T> is most accurate?

A. Stack. B. Immutable list returning new instance on change. C. Concurrent dictionary. D. Mutable list.

Select an answer to check.

Answer: Immutable list returning new instance on change.

Here, Immutable list returning new instance on change. is the right choice. Thread-safe by immutability. This is the most accurate statement for which statement about immutablelist<t> is most accurate. Competing choices sound plausible, but they miss the key condition.

Q72. How is ImmutableList<T> best characterized?

A. Immutable list returning new instance on change. B. Mutable list. C. Stack. D. Concurrent dictionary.

Select an answer to check.

Answer: Immutable list returning new instance on change.

In this case, Immutable list returning new instance on change. is correct. Thread-safe by immutability. This is the most accurate statement for how is immutablelist<t> best characterized. Competing choices sound plausible, but they miss the key condition.

Q73. Which option best describes ConcurrentDictionary<K,V> in C#/.NET?

A. Pure HashSet. B. Immutable dictionary. C. Thread-safe hash map. D. Sorted dictionary.

Select an answer to check.

Answer: Thread-safe hash map.

The best option here is Thread-safe hash map.. Lock-striping internally. This is the most accurate statement for which option best describes concurrentdictionary<k,v> in c#/.net. Competing choices sound plausible, but they miss the key condition.

Q74. What is the primary purpose of ConcurrentDictionary<K,V>?

A. Pure HashSet. B. Thread-safe hash map. C. Immutable dictionary. D. Sorted dictionary.

Select an answer to check.

Answer: Thread-safe hash map.

For this question, Thread-safe hash map. is correct. Lock-striping internally. This is the most accurate statement for what is the primary purpose of concurrentdictionary<k,v>. Competing choices sound plausible, but they miss the key condition.

Q75. Which statement about ConcurrentDictionary<K,V> is most accurate?

A. Pure HashSet. B. Sorted dictionary. C. Thread-safe hash map. D. Immutable dictionary.

Select an answer to check.

Answer: Thread-safe hash map.

Thread-safe hash map. is the correct answer here. Lock-striping internally. This is the most accurate statement for which statement about concurrentdictionary<k,v> is most accurate. Competing choices sound plausible, but they miss the key condition.

Q76. How is ConcurrentDictionary<K,V> best characterized?

A. Immutable dictionary. B. Pure HashSet. C. Thread-safe hash map. D. Sorted dictionary.

Select an answer to check.

Answer: Thread-safe hash map.

Here, Thread-safe hash map. is the right choice. Lock-striping internally. It aligns directly with what the question asks about how is concurrentdictionary<k,v> best characterized. The remaining choices fail because they don’t satisfy the full definition.

Q77. Which option best describes default(T) in C#/.NET?

A. Always empty string. B. Default value for T (null/zero/struct default). C. Always null. D. Always zero.

Select an answer to check.

Answer: Default value for T (null/zero/struct default).

In this case, Default value for T (null/zero/struct default). is correct. Useful in generic code. It aligns directly with what the question asks about which option best describes default(t) in c#/.net. The remaining choices fail because they don’t satisfy the full definition.

Q78. What is the primary purpose of default(T)?

A. Default value for T (null/zero/struct default). B. Always empty string. C. Always zero. D. Always null.

Select an answer to check.

Answer: Default value for T (null/zero/struct default).

The best option here is Default value for T (null/zero/struct default).. Useful in generic code. It aligns directly with what the question asks about what is the primary purpose of default(t). The remaining choices fail because they don’t satisfy the full definition.

Q79. Which statement about default(T) is most accurate?

A. Always zero. B. Default value for T (null/zero/struct default). C. Always empty string. D. Always null.

Select an answer to check.

Answer: Default value for T (null/zero/struct default).

For this question, Default value for T (null/zero/struct default). is correct. Useful in generic code. It aligns directly with what the question asks about which statement about default(t) is most accurate. The remaining choices fail because they don’t satisfy the full definition.

Q80. How is default(T) best characterized?

A. Always null. B. Default value for T (null/zero/struct default). C. Always empty string. D. Always zero.

Select an answer to check.

Answer: Default value for T (null/zero/struct default).

Default value for T (null/zero/struct default). is the correct answer here. Useful in generic code. It aligns directly with what the question asks about how is default(t) best characterized. The remaining choices fail because they don’t satisfy the full definition.

Q81. Which option best describes typeof(T) in C#/.NET?

A. Returns the runtime Type for T. B. A reflection method only. C. A delegate. D. An attribute.

Select an answer to check.

Answer: Returns the runtime Type for T.

Here, Returns the runtime Type for T. is the right choice. Useful for branching by type. This matches the core idea being tested around which option best describes typeof(t) in c#/.net. The remaining choices fail because they don’t satisfy the full definition.

Q82. What is the primary purpose of typeof(T)?

A. Returns the runtime Type for T. B. A reflection method only. C. An attribute. D. A delegate.

Select an answer to check.

Answer: Returns the runtime Type for T.

In this case, Returns the runtime Type for T. is correct. Useful for branching by type. This matches the core idea being tested around what is the primary purpose of typeof(t). The remaining choices fail because they don’t satisfy the full definition.

Q83. Which statement about typeof(T) is most accurate?

A. A reflection method only. B. An attribute. C. Returns the runtime Type for T. D. A delegate.

Select an answer to check.

Answer: Returns the runtime Type for T.

The best option here is Returns the runtime Type for T.. Useful for branching by type. This matches the core idea being tested around which statement about typeof(t) is most accurate. The remaining choices fail because they don’t satisfy the full definition.

Q84. How is typeof(T) best characterized?

A. An attribute. B. A delegate. C. A reflection method only. D. Returns the runtime Type for T.

Select an answer to check.

Answer: Returns the runtime Type for T.

For this question, Returns the runtime Type for T. is correct. Useful for branching by type. This matches the core idea being tested around how is typeof(t) best characterized. The remaining choices fail because they don’t satisfy the full definition.

Q85. Which option best describes generic delegates in C#/.NET?

A. Action<T>, Func<T,TR>, Predicate<T>. B. Static methods only. C. Lambda only. D. Non-generic Delegate only.

Select an answer to check.

Answer: Action<T>, Func<T,TR>, Predicate<T>.

Action<T>, Func<T,TR>, Predicate<T>. is the correct answer here. Reduces custom delegate types. This matches the core idea being tested around which option best describes generic delegates in c#/.net. The remaining choices fail because they don’t satisfy the full definition.

Q86. What is the primary purpose of generic delegates?

A. Lambda only. B. Non-generic Delegate only. C. Action<T>, Func<T,TR>, Predicate<T>. D. Static methods only.

Select an answer to check.

Answer: Action<T>, Func<T,TR>, Predicate<T>.

Here, Action<T>, Func<T,TR>, Predicate<T>. is the right choice. Reduces custom delegate types. That is exactly the concept behind what is the primary purpose of generic delegates in this context. The remaining choices fail because they don’t satisfy the full definition.

Q87. Which statement about generic delegates is most accurate?

A. Non-generic Delegate only. B. Action<T>, Func<T,TR>, Predicate<T>. C. Lambda only. D. Static methods only.

Select an answer to check.

Answer: Action<T>, Func<T,TR>, Predicate<T>.

In this case, Action<T>, Func<T,TR>, Predicate<T>. is correct. Reduces custom delegate types. That is exactly the concept behind which statement about generic delegates is most accurate in this context. The remaining choices fail because they don’t satisfy the full definition.

Q88. How is generic delegates best characterized?

A. Static methods only. B. Action<T>, Func<T,TR>, Predicate<T>. C. Non-generic Delegate only. D. Lambda only.

Select an answer to check.

Answer: Action<T>, Func<T,TR>, Predicate<T>.

The best option here is Action<T>, Func<T,TR>, Predicate<T>.. Reduces custom delegate types. That is exactly the concept behind how is generic delegates best characterized in this context. The remaining choices fail because they don’t satisfy the full definition.

Q89. Which option best describes generic interfaces in C#/.NET?

A. IEnumerable<T>, IComparable<T>, etc. B. Static classes only. C. Non-generic interfaces only. D. Pure abstract classes only.

Select an answer to check.

Answer: IEnumerable<T>, IComparable<T>, etc.

For this question, IEnumerable<T>, IComparable<T>, etc. is correct. Common in BCL. That is exactly the concept behind which option best describes generic interfaces in c#/.net in this context. The remaining choices fail because they don’t satisfy the full definition.

Q90. What is the primary purpose of generic interfaces?

A. Pure abstract classes only. B. IEnumerable<T>, IComparable<T>, etc. C. Non-generic interfaces only. D. Static classes only.

Select an answer to check.

Answer: IEnumerable<T>, IComparable<T>, etc.

IEnumerable<T>, IComparable<T>, etc. is the correct answer here. Common in BCL. That is exactly the concept behind what is the primary purpose of generic interfaces in this context. The remaining choices fail because they don’t satisfy the full definition.

Q91. Which statement about generic interfaces is most accurate?

A. Pure abstract classes only. B. Non-generic interfaces only. C. Static classes only. D. IEnumerable<T>, IComparable<T>, etc.

Select an answer to check.

Answer: IEnumerable<T>, IComparable<T>, etc.

Here, IEnumerable<T>, IComparable<T>, etc. is the right choice. Common in BCL. It fits the requirement in the prompt about which statement about generic interfaces is most accurate. The remaining choices fail because they don’t satisfy the full definition.

Q92. How is generic interfaces best characterized?

A. Pure abstract classes only. B. Non-generic interfaces only. C. Static classes only. D. IEnumerable<T>, IComparable<T>, etc.

Select an answer to check.

Answer: IEnumerable<T>, IComparable<T>, etc.

In this case, IEnumerable<T>, IComparable<T>, etc. is correct. Common in BCL. It fits the requirement in the prompt about how is generic interfaces best characterized. The remaining choices fail because they don’t satisfy the full definition.

Q93. Which option best describes type erasure (vs C#) in C#/.NET?

A. C# erases types like Java. B. Types are pure macros. C. C# does not erase generic types at runtime. D. Types are always object at runtime.

Select an answer to check.

Answer: C# does not erase generic types at runtime.

The best option here is C# does not erase generic types at runtime.. Reified generics in CLR. It fits the requirement in the prompt about which option best describes type erasure (vs c#). The remaining choices fail because they don’t satisfy the full definition.

Q94. What is the primary purpose of type erasure (vs C#)?

A. Types are pure macros. B. C# does not erase generic types at runtime. C. Types are always object at runtime. D. C# erases types like Java.

Select an answer to check.

Answer: C# does not erase generic types at runtime.

For this question, C# does not erase generic types at runtime. is correct. Reified generics in CLR. It fits the requirement in the prompt about what is the primary purpose of type erasure. The remaining choices fail because they don’t satisfy the full definition.

Q95. Which statement about type erasure (vs C#) is most accurate?

A. C# does not erase generic types at runtime. B. C# erases types like Java. C. Types are always object at runtime. D. Types are pure macros.

Select an answer to check.

Answer: C# does not erase generic types at runtime.

C# does not erase generic types at runtime. is the correct answer here. Reified generics in CLR. It fits the requirement in the prompt about which statement about type erasure (vs c#) is. The remaining choices fail because they don’t satisfy the full definition.

Q96. How is type erasure (vs C#) best characterized?

A. C# does not erase generic types at runtime. B. Types are pure macros. C. C# erases types like Java. D. Types are always object at runtime.

Select an answer to check.

Answer: C# does not erase generic types at runtime.

Here, C# does not erase generic types at runtime. is the right choice. Reified generics in CLR. This is the most accurate statement for how is type erasure (vs c#) best characterized. The remaining choices fail because they don’t satisfy the full definition.

Q97. Which option best describes nested generic types in C#/.NET?

A. Compose generics like List<Dictionary<string,int>>. B. Evaluated at runtime only. C. Disallowed in C#. D. Always require reflection.

Select an answer to check.

Answer: Compose generics like List<Dictionary<string,int>>.

In this case, Compose generics like List<Dictionary<string,int>>. is correct. Works naturally. This is the most accurate statement for which option best describes nested generic types in. The remaining choices fail because they don’t satisfy the full definition.

Q98. What is the primary purpose of nested generic types?

A. Always require reflection. B. Disallowed in C#. C. Evaluated at runtime only. D. Compose generics like List<Dictionary<string,int>>.

Select an answer to check.

Answer: Compose generics like List<Dictionary<string,int>>.

The best option here is Compose generics like List<Dictionary<string,int>>.. Works naturally. This is the most accurate statement for what is the primary purpose of nested generic. The remaining choices fail because they don’t satisfy the full definition.

Q99. Which statement about nested generic types is most accurate?

A. Disallowed in C#. B. Always require reflection. C. Evaluated at runtime only. D. Compose generics like List<Dictionary<string,int>>.

Select an answer to check.

Answer: Compose generics like List<Dictionary<string,int>>.

For this question, Compose generics like List<Dictionary<string,int>>. is correct. Works naturally. This is the most accurate statement for which statement about nested generic types is most. The remaining choices fail because they don’t satisfy the full definition.

Q100. How is nested generic types best characterized?

A. Compose generics like List<Dictionary<string,int>>. B. Disallowed in C#. C. Evaluated at runtime only. D. Always require reflection.

Select an answer to check.

Answer: Compose generics like List<Dictionary<string,int>>.

Compose generics like List<Dictionary<string,int>>. is the correct answer here. Works naturally. This is the most accurate statement for how is nested generic types best characterized. The remaining choices fail because they don’t satisfy the full definition.