Delegates and Events in C Sharp MCQ question and answer with solution

11

In C#, what is the purpose of the Action delegate?

A) Represents a delegate that encapsulates a method that takes no parameters and does not return a value B) Represents a delegate that encapsulates a method that takes no parameters and returns a value C) Represents a delegate that encapsulates a method that has two parameters and returns a value D) Represents a delegate that can encapsulate a method with a single parameter and does not return a value

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Answer & Solution

Answer: Option D

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12

What is the benefit of using events and delegates in C#?

A) Increases code complexity and tight coupling between components B) Reduces performance overhead and increases code maintainability C) Decouples the publisher from the subscriber, allowing for loosely coupled applications D) Increases tight coupling between components and makes code less reusable

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Answer & Solution

Answer: Option C

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13

In C#, which keyword is used to raise an event?

A) this B) base C) event D) raise

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Answer & Solution

Answer: Option C

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14

What is the purpose of the Func delegate in C#?

A) Represents a delegate that encapsulates a method that takes no parameters and returns a value B) Represents a delegate that can encapsulate a method with one parameter and returns a value C) Represents a delegate that encapsulates a method that takes no parameters and does not return a value D) None of the above

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Answer & Solution

Answer: Option B

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15

In C#, which keyword is used to declare an event that can be raised by any class within the same assembly, but not outside it?

A) internal B) protected internal C) private D) public

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Answer & Solution

Answer: Option B

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16

What is the primary purpose of using delegates in C#?

A) To manage memory B) To handle exceptions C) To provide a way to reference and invoke methods D) To declare classes

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Answer & Solution

Answer: Option C

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17

In C#, which keyword is used to declare an event in an interface?

A) interface B) delegate C) class D) event

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Answer & Solution

Answer: Option D

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18

What is the main advantage of using events over direct method calls in C#?

A) Encapsulation and decoupling B) Performance optimization C) Code readability D) Simplified syntax

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Answer & Solution

Answer: Option A

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19

Which delegate type is used to represent methods that take no parameters and return a value in C#?

A) EventHandler B) Predicate C) Action D) Func

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Answer & Solution

Answer: Option D

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20

What does the += operator do when used with events in C#?

A) Removes an event handler from the event B) Subscribes to the event C) Adds an event handler to the event D) Invokes the event

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Answer & Solution

Answer: Option C

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Delegates and Events in C Sharp MCQ question and answer with solution | C# Program MCQs