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

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In C#, which delegate type is used to represent methods that take multiple parameters and return a value?

A) Predicate B) Func C) EventHandler D) None of the above

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Answer & Solution

Answer: Option B

No explanation is given for this question. Let's Discuss on Board

What is a multicast delegate in C#?

A) A delegate that is used for asynchronous operations B) A delegate that can only invoke a single method C) A delegate that can hold references to multiple methods D) A delegate that is defined with multiple parameters

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Answer & Solution

Answer: Option C

No explanation is given for this question. Let's Discuss on Board

What is the purpose of the Remove method associated with events in C#?

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

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Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

In C#, which access modifier is commonly used for events that allow only the defining class to raise them?

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

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Answer & Solution

Answer: Option A

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What is the purpose of the Delegate.Combine method in C#?

A) Creates a new multicast delegate B) Invokes all delegates in a multicast delegate C) Removes a delegate from a multicast delegate D) Combines two delegates into a multicast delegate

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Answer & Solution

Answer: Option D

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

A) It represents a method that handles events B) It combines two delegates into a multicast delegate C) It serves as a template for creating event handler delegates D) It represents a method that takes no parameters and returns a value

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Answer & Solution

Answer: Option C

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What is the purpose of the EventInfo.GetAddMethod method in C#?

A) Checks if an event handler exists for a given event B) Invokes the event handler method C) Retrieves the method used to add event handlers D) Retrieves the method used to remove event handlers

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Answer & Solution

Answer: Option C

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In C#, what is the purpose of the BeginInvoke and EndInvoke methods associated with delegates?

A) To begin and end a transaction B) To check if a delegate is null before invoking it C) To pass parameters to a delegate method without invoking it D) To perform asynchronous invocation of delegate methods

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Answer & Solution

Answer: Option D

No explanation is given for this question. Let's Discuss on Board

What does the following C# code set defines?

public Gen(T o) 
{
     ob = o; 
}

A) Generics class Declaration B) Declaration of variable C) Generic constructor declaration D) All of the mentioned

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Answer & Solution

Answer: Option C

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To implement delegates, the necessary condition is?

A) class declaration B) inheritance C) runtime polymorphism D) exceptions

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Answer & Solution

Answer: Option A

No explanation is given for this question. Let's Discuss on Board

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