C# Delegates and Events MCQ Questions with Answers (Latest 2026)

Q1. Which option best describes a delegate in C#/.NET?

A. A struct constraint. B. A class hierarchy root. C. Type-safe function pointer. D. An interface only.

Select an answer to check.

Answer: Type-safe function pointer.

Here, Type-safe function pointer. is the right choice. Foundation for callbacks/events. It aligns directly with what the question asks about which option best describes a delegate in c#/.net. A quick elimination of partially true options helps confirm it.

Q2. What is the primary purpose of a delegate?

A. Type-safe function pointer. B. A class hierarchy root. C. An interface only. D. A struct constraint.

Select an answer to check.

Answer: Type-safe function pointer.

In this case, Type-safe function pointer. is correct. Foundation for callbacks/events. It aligns directly with what the question asks about what is the primary purpose of a delegate. A quick elimination of partially true options helps confirm it.

Q3. Which statement about a delegate is most accurate?

A. A class hierarchy root. B. Type-safe function pointer. C. An interface only. D. A struct constraint.

Select an answer to check.

Answer: Type-safe function pointer.

The best option here is Type-safe function pointer.. Foundation for callbacks/events. It aligns directly with what the question asks about which statement about a delegate is most accurate. A quick elimination of partially true options helps confirm it.

Q4. How is a delegate best characterized?

A. A class hierarchy root. B. A struct constraint. C. Type-safe function pointer. D. An interface only.

Select an answer to check.

Answer: Type-safe function pointer.

For this question, Type-safe function pointer. is correct. Foundation for callbacks/events. It aligns directly with what the question asks about how is a delegate best characterized. A quick elimination of partially true options helps confirm it.

Q5. Which option best describes Action<T> in C#/.NET?

A. A delegate that returns a value. B. An interface. C. A struct. D. Predefined delegate returning void with parameters.

Select an answer to check.

Answer: Predefined delegate returning void with parameters.

Predefined delegate returning void with parameters. is the correct answer here. Common for callbacks. It aligns directly with what the question asks about which option best describes action<t> in c#/.net. A quick elimination of partially true options helps confirm it.

Q6. What is the primary purpose of Action<T>?

A. A delegate that returns a value. B. Predefined delegate returning void with parameters. C. A struct. D. An interface.

Select an answer to check.

Answer: Predefined delegate returning void with parameters.

Here, Predefined delegate returning void with parameters. is the right choice. Common for callbacks. This matches the core idea being tested around what is the primary purpose of action<t>. A quick elimination of partially true options helps confirm it.

Q7. Which statement about Action<T> is most accurate?

A. A delegate that returns a value. B. An interface. C. Predefined delegate returning void with parameters. D. A struct.

Select an answer to check.

Answer: Predefined delegate returning void with parameters.

In this case, Predefined delegate returning void with parameters. is correct. Common for callbacks. This matches the core idea being tested around which statement about action<t> is most accurate. A quick elimination of partially true options helps confirm it.

Q8. How is Action<T> best characterized?

A. Predefined delegate returning void with parameters. B. A struct. C. An interface. D. A delegate that returns a value.

Select an answer to check.

Answer: Predefined delegate returning void with parameters.

The best option here is Predefined delegate returning void with parameters.. Common for callbacks. This matches the core idea being tested around how is action<t> best characterized. A quick elimination of partially true options helps confirm it.

Q9. Which option best describes Func<T,TResult> in C#/.NET?

A. An action delegate (void). B. A struct. C. Predefined delegate returning TResult. D. A generic interface.

Select an answer to check.

Answer: Predefined delegate returning TResult.

For this question, Predefined delegate returning TResult. is correct. Common in LINQ. This matches the core idea being tested around which option best describes func<t,tresult> in c#/.net. A quick elimination of partially true options helps confirm it.

Q10. What is the primary purpose of Func<T,TResult>?

A. Predefined delegate returning TResult. B. A struct. C. An action delegate (void). D. A generic interface.

Select an answer to check.

Answer: Predefined delegate returning TResult.

Predefined delegate returning TResult. is the correct answer here. Common in LINQ. This matches the core idea being tested around what is the primary purpose of func<t,tresult>. A quick elimination of partially true options helps confirm it.

Q11. Which statement about Func<T,TResult> is most accurate?

A. Predefined delegate returning TResult. B. An action delegate (void). C. A struct. D. A generic interface.

Select an answer to check.

Answer: Predefined delegate returning TResult.

Here, Predefined delegate returning TResult. is the right choice. Common in LINQ. That is exactly the concept behind which statement about func<t,tresult> is most accurate in this context. A quick elimination of partially true options helps confirm it.

Q12. How is Func<T,TResult> best characterized?

A. Predefined delegate returning TResult. B. A generic interface. C. A struct. D. An action delegate (void).

Select an answer to check.

Answer: Predefined delegate returning TResult.

In this case, Predefined delegate returning TResult. is correct. Common in LINQ. That is exactly the concept behind how is func<t,tresult> best characterized in this context. A quick elimination of partially true options helps confirm it.

Q13. Which option best describes Predicate<T> in C#/.NET?

A. Func<T,bool> for filter predicates. B. An Action. C. A struct. D. A class.

Select an answer to check.

Answer: Func<T,bool> for filter predicates.

The best option here is Func<T,bool> for filter predicates.. Used in collection methods. That is exactly the concept behind which option best describes predicate<t> in c#/.net in this context. A quick elimination of partially true options helps confirm it.

Q14. What is the primary purpose of Predicate<T>?

A. A class. B. Func<T,bool> for filter predicates. C. A struct. D. An Action.

Select an answer to check.

Answer: Func<T,bool> for filter predicates.

For this question, Func<T,bool> for filter predicates. is correct. Used in collection methods. That is exactly the concept behind what is the primary purpose of predicate<t> in this context. A quick elimination of partially true options helps confirm it.

Q15. Which statement about Predicate<T> is most accurate?

A. An Action. B. A struct. C. A class. D. Func<T,bool> for filter predicates.

Select an answer to check.

Answer: Func<T,bool> for filter predicates.

Func<T,bool> for filter predicates. is the correct answer here. Used in collection methods. That is exactly the concept behind which statement about predicate<t> is most accurate in this context. A quick elimination of partially true options helps confirm it.

Q16. How is Predicate<T> best characterized?

A. A struct. B. An Action. C. A class. D. Func<T,bool> for filter predicates.

Select an answer to check.

Answer: Func<T,bool> for filter predicates.

Here, Func<T,bool> for filter predicates. is the right choice. Used in collection methods. It fits the requirement in the prompt about how is predicate<t> best characterized. A quick elimination of partially true options helps confirm it.

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

A. A class. B. Standard delegate for events: (object sender, EventArgs e). C. A struct. D. A LINQ provider.

Select an answer to check.

Answer: Standard delegate for events: (object sender, EventArgs e).

In this case, Standard delegate for events: (object sender, EventArgs e). is correct. Foundation for .NET events. It fits the requirement in the prompt about which option best describes eventhandler in c#/.net. A quick elimination of partially true options helps confirm it.

Q18. What is the primary purpose of EventHandler?

A. A class. B. A struct. C. Standard delegate for events: (object sender, EventArgs e). D. A LINQ provider.

Select an answer to check.

Answer: Standard delegate for events: (object sender, EventArgs e).

The best option here is Standard delegate for events: (object sender, EventArgs e).. Foundation for .NET events. It fits the requirement in the prompt about what is the primary purpose of eventhandler. A quick elimination of partially true options helps confirm it.

Q19. Which statement about EventHandler is most accurate?

A. A LINQ provider. B. A struct. C. A class. D. Standard delegate for events: (object sender, EventArgs e).

Select an answer to check.

Answer: Standard delegate for events: (object sender, EventArgs e).

For this question, Standard delegate for events: (object sender, EventArgs e). is correct. Foundation for .NET events. It fits the requirement in the prompt about which statement about eventhandler is most accurate. A quick elimination of partially true options helps confirm it.

Q20. How is EventHandler best characterized?

A. A LINQ provider. B. Standard delegate for events: (object sender, EventArgs e). C. A struct. D. A class.

Select an answer to check.

Answer: Standard delegate for events: (object sender, EventArgs e).

Standard delegate for events: (object sender, EventArgs e). is the correct answer here. Foundation for .NET events. It fits the requirement in the prompt about how is eventhandler best characterized. A quick elimination of partially true options helps confirm it.

Q21. Which option best describes EventHandler<TArgs> in C#/.NET?

A. An interface. B. Generic version with custom EventArgs. C. A class. D. A struct.

Select an answer to check.

Answer: Generic version with custom EventArgs.

Here, Generic version with custom EventArgs. is the right choice. Carries typed event data. This is the most accurate statement for which option best describes eventhandler<targs> in c#/.net. A quick elimination of partially true options helps confirm it.

Q22. What is the primary purpose of EventHandler<TArgs>?

A. An interface. B. A class. C. A struct. D. Generic version with custom EventArgs.

Select an answer to check.

Answer: Generic version with custom EventArgs.

In this case, Generic version with custom EventArgs. is correct. Carries typed event data. This is the most accurate statement for what is the primary purpose of eventhandler<targs>. A quick elimination of partially true options helps confirm it.

Q23. Which statement about EventHandler<TArgs> is most accurate?

A. An interface. B. A struct. C. A class. D. Generic version with custom EventArgs.

Select an answer to check.

Answer: Generic version with custom EventArgs.

The best option here is Generic version with custom EventArgs.. Carries typed event data. This is the most accurate statement for which statement about eventhandler<targs> is most accurate. A quick elimination of partially true options helps confirm it.

Q24. How is EventHandler<TArgs> best characterized?

A. An interface. B. Generic version with custom EventArgs. C. A class. D. A struct.

Select an answer to check.

Answer: Generic version with custom EventArgs.

For this question, Generic version with custom EventArgs. is correct. Carries typed event data. This is the most accurate statement for how is eventhandler<targs> best characterized. A quick elimination of partially true options helps confirm it.

Q25. Which option best describes an event in C#/.NET?

A. A class hierarchy. B. An interface. C. A static field. D. A multicast delegate field with restricted usage.

Select an answer to check.

Answer: A multicast delegate field with restricted usage.

A multicast delegate field with restricted usage. is the correct answer here. Subscribers add via +=. This is the most accurate statement for which option best describes an event in c#/.net. A quick elimination of partially true options helps confirm it.

Q26. What is the primary purpose of an event?

A. A class hierarchy. B. A multicast delegate field with restricted usage. C. A static field. D. An interface.

Select an answer to check.

Answer: A multicast delegate field with restricted usage.

Here, A multicast delegate field with restricted usage. is the right choice. Subscribers add via +=. It aligns directly with what the question asks about what is the primary purpose of an event. The other options are either incomplete or contextually incorrect.

Q27. Which statement about an event is most accurate?

A. A multicast delegate field with restricted usage. B. An interface. C. A class hierarchy. D. A static field.

Select an answer to check.

Answer: A multicast delegate field with restricted usage.

In this case, A multicast delegate field with restricted usage. is correct. Subscribers add via +=. It aligns directly with what the question asks about which statement about an event is most accurate. The other options are either incomplete or contextually incorrect.

Q28. How is an event best characterized?

A. An interface. B. A class hierarchy. C. A multicast delegate field with restricted usage. D. A static field.

Select an answer to check.

Answer: A multicast delegate field with restricted usage.

The best option here is A multicast delegate field with restricted usage.. Subscribers add via +=. It aligns directly with what the question asks about how is an event best characterized. The other options are either incomplete or contextually incorrect.

Q29. Which option best describes multicast delegate in C#/.NET?

A. Combines multiple methods into one delegate. B. A subclass of Task. C. A struct of two delegates. D. An interface.

Select an answer to check.

Answer: Combines multiple methods into one delegate.

For this question, Combines multiple methods into one delegate. is correct. Invocation list runs all methods. It aligns directly with what the question asks about which option best describes multicast delegate in c#/.net. The other options are either incomplete or contextually incorrect.

Q30. What is the primary purpose of multicast delegate?

A. A struct of two delegates. B. An interface. C. Combines multiple methods into one delegate. D. A subclass of Task.

Select an answer to check.

Answer: Combines multiple methods into one delegate.

Combines multiple methods into one delegate. is the correct answer here. Invocation list runs all methods. It aligns directly with what the question asks about what is the primary purpose of multicast delegate. The other options are either incomplete or contextually incorrect.

Q31. Which statement about multicast delegate is most accurate?

A. An interface. B. A subclass of Task. C. A struct of two delegates. D. Combines multiple methods into one delegate.

Select an answer to check.

Answer: Combines multiple methods into one delegate.

Here, Combines multiple methods into one delegate. is the right choice. Invocation list runs all methods. This matches the core idea being tested around which statement about multicast delegate is most accurate. The other options are either incomplete or contextually incorrect.

Q32. How is multicast delegate best characterized?

A. Combines multiple methods into one delegate. B. A struct of two delegates. C. An interface. D. A subclass of Task.

Select an answer to check.

Answer: Combines multiple methods into one delegate.

In this case, Combines multiple methods into one delegate. is correct. Invocation list runs all methods. This matches the core idea being tested around how is multicast delegate best characterized. The other options are either incomplete or contextually incorrect.

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

A. Static methods only. B. Lambda expressions only. C. Local functions only. D. Inline delegate using delegate(...) {} syntax.

Select an answer to check.

Answer: Inline delegate using delegate(...) {} syntax.

The best option here is Inline delegate using delegate(...) {} syntax.. Predecessor to lambdas. This matches the core idea being tested around which option best describes anonymous methods in c#/.net. The other options are either incomplete or contextually incorrect.

Q34. What is the primary purpose of anonymous methods?

A. Inline delegate using delegate(...) {} syntax. B. Static methods only. C. Local functions only. D. Lambda expressions only.

Select an answer to check.

Answer: Inline delegate using delegate(...) {} syntax.

For this question, Inline delegate using delegate(...) {} syntax. is correct. Predecessor to lambdas. This matches the core idea being tested around what is the primary purpose of anonymous methods. The other options are either incomplete or contextually incorrect.

Q35. Which statement about anonymous methods is most accurate?

A. Lambda expressions only. B. Local functions only. C. Static methods only. D. Inline delegate using delegate(...) {} syntax.

Select an answer to check.

Answer: Inline delegate using delegate(...) {} syntax.

Inline delegate using delegate(...) {} syntax. is the correct answer here. Predecessor to lambdas. This matches the core idea being tested around which statement about anonymous methods is most accurate. The other options are either incomplete or contextually incorrect.

Q36. How is anonymous methods best characterized?

A. Inline delegate using delegate(...) {} syntax. B. Lambda expressions only. C. Local functions only. D. Static methods only.

Select an answer to check.

Answer: Inline delegate using delegate(...) {} syntax.

Here, Inline delegate using delegate(...) {} syntax. is the right choice. Predecessor to lambdas. That is exactly the concept behind how is anonymous methods best characterized in this context. The other options are either incomplete or contextually incorrect.

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

A. A class instance only. B. Concise inline anonymous function. C. An interface only. D. A struct only.

Select an answer to check.

Answer: Concise inline anonymous function.

In this case, Concise inline anonymous function. is correct. Compiled to delegate or expression tree. That is exactly the concept behind which option best describes lambda expression in c#/.net in this context. The other options are either incomplete or contextually incorrect.

Q38. What is the primary purpose of lambda expression?

A. A struct only. B. Concise inline anonymous function. C. A class instance only. D. An interface only.

Select an answer to check.

Answer: Concise inline anonymous function.

The best option here is Concise inline anonymous function.. Compiled to delegate or expression tree. That is exactly the concept behind what is the primary purpose of lambda expression in this context. The other options are either incomplete or contextually incorrect.

Q39. Which statement about lambda expression is most accurate?

A. A struct only. B. Concise inline anonymous function. C. An interface only. D. A class instance only.

Select an answer to check.

Answer: Concise inline anonymous function.

For this question, Concise inline anonymous function. is correct. Compiled to delegate or expression tree. That is exactly the concept behind which statement about lambda expression is most accurate in this context. The other options are either incomplete or contextually incorrect.

Q40. How is lambda expression best characterized?

A. An interface only. B. Concise inline anonymous function. C. A struct only. D. A class instance only.

Select an answer to check.

Answer: Concise inline anonymous function.

Concise inline anonymous function. is the correct answer here. Compiled to delegate or expression tree. That is exactly the concept behind how is lambda expression best characterized in this context. The other options are either incomplete or contextually incorrect.

Q41. Which option best describes expression tree in C#/.NET?

A. A delegate. B. A struct. C. A compiled IL method. D. Code as data: an AST representing a lambda.

Select an answer to check.

Answer: Code as data: an AST representing a lambda.

Here, Code as data: an AST representing a lambda. is the right choice. Used by LINQ providers. It fits the requirement in the prompt about which option best describes expression tree in c#/.net. The other options are either incomplete or contextually incorrect.

Q42. What is the primary purpose of expression tree?

A. A compiled IL method. B. A struct. C. A delegate. D. Code as data: an AST representing a lambda.

Select an answer to check.

Answer: Code as data: an AST representing a lambda.

In this case, Code as data: an AST representing a lambda. is correct. Used by LINQ providers. It fits the requirement in the prompt about what is the primary purpose of expression tree. The other options are either incomplete or contextually incorrect.

Q43. Which statement about expression tree is most accurate?

A. A delegate. B. Code as data: an AST representing a lambda. C. A compiled IL method. D. A struct.

Select an answer to check.

Answer: Code as data: an AST representing a lambda.

The best option here is Code as data: an AST representing a lambda.. Used by LINQ providers. It fits the requirement in the prompt about which statement about expression tree is most accurate. The other options are either incomplete or contextually incorrect.

Q44. How is expression tree best characterized?

A. A compiled IL method. B. A delegate. C. Code as data: an AST representing a lambda. D. A struct.

Select an answer to check.

Answer: Code as data: an AST representing a lambda.

For this question, Code as data: an AST representing a lambda. is correct. Used by LINQ providers. It fits the requirement in the prompt about how is expression tree best characterized. The other options are either incomplete or contextually incorrect.

Q45. Which option best describes event accessor in C#/.NET?

A. Custom add/remove for events. B. A constructor. C. A method modifier. D. A property accessor.

Select an answer to check.

Answer: Custom add/remove for events.

Custom add/remove for events. is the correct answer here. Enables custom storage. It fits the requirement in the prompt about which option best describes event accessor in c#/.net. The other options are either incomplete or contextually incorrect.

Q46. What is the primary purpose of event accessor?

A. A property accessor. B. Custom add/remove for events. C. A constructor. D. A method modifier.

Select an answer to check.

Answer: Custom add/remove for events.

Here, Custom add/remove for events. is the right choice. Enables custom storage. This is the most accurate statement for what is the primary purpose of event accessor. The other options are either incomplete or contextually incorrect.

Q47. Which statement about event accessor is most accurate?

A. A method modifier. B. A property accessor. C. Custom add/remove for events. D. A constructor.

Select an answer to check.

Answer: Custom add/remove for events.

In this case, Custom add/remove for events. is correct. Enables custom storage. This is the most accurate statement for which statement about event accessor is most accurate. The other options are either incomplete or contextually incorrect.

Q48. How is event accessor best characterized?

A. A property accessor. B. A constructor. C. A method modifier. D. Custom add/remove for events.

Select an answer to check.

Answer: Custom add/remove for events.

The best option here is Custom add/remove for events.. Enables custom storage. This is the most accurate statement for how is event accessor best characterized. The other options are either incomplete or contextually incorrect.

Q49. Which option best describes WeakEventManager in C#/.NET?

A. A delegate type. B. Helps avoid memory leaks via weak event subscriptions. C. A logging system. D. A type of GC.

Select an answer to check.

Answer: Helps avoid memory leaks via weak event subscriptions.

For this question, Helps avoid memory leaks via weak event subscriptions. is correct. Prevents publisher-keeps-subscriber-alive issues. This is the most accurate statement for which option best describes weakeventmanager in c#/.net. The other options are either incomplete or contextually incorrect.

Q50. What is the primary purpose of WeakEventManager?

A. Helps avoid memory leaks via weak event subscriptions. B. A logging system. C. A delegate type. D. A type of GC.

Select an answer to check.

Answer: Helps avoid memory leaks via weak event subscriptions.

Helps avoid memory leaks via weak event subscriptions. is the correct answer here. Prevents publisher-keeps-subscriber-alive issues. This is the most accurate statement for what is the primary purpose of weakeventmanager. The other options are either incomplete or contextually incorrect.