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Welcome to the Delegates and Generics MCQs Page

Dive deep into the fascinating world of Delegates and Generics with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Delegates and Generics, a crucial aspect of C# programming. In this section, you will encounter a diverse range of MCQs that cover various aspects of Delegates and Generics, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within C# programming.

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Check out the MCQs below to embark on an enriching journey through Delegates and Generics. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of C# programming.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of Delegates and Generics. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Delegates and Generics MCQs | Page 1 of 7

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Q1.
Which of the following statements is incorrect about delegate?

a.

Delegates are reference types.

b.

Delegates are object oriented.

c.

Delegates are type-safe.

d.

Only one method can be called using a delegate.

Discuss
Answer: (d).Only one method can be called using a delegate.
Q2.
In which of the following areas are delegates commonly used?

1. Remoting
2. Serialization
3. File Input/Output
4. Multithreading
5. Event handling

a.

1 and 2 only

b.

1 and 5 only

c.

1, 2 and 3 only

d.

4 and 5 only

Discuss
Answer: (d).4 and 5 only
Q3.
Which of the following is the necessary condition for implementing delegates?

a.

Class declaration

b.

Inheritance

c.

Run-time Polymorphism

d.

Exceptions

Discuss
Answer: (a).Class declaration
Q4.
Which of the following statements are correct about the delegate declaration given below?

delegate void del(int i);

1. On declaring the delegate a class called del will get created.
2. The signature of del need not be same as the signature of the method that we intend to call using it.
3. The del class will be derived from the MulticastDelegate class.
4. The method that can be called using del should not be a static method.
5. The del class will contain a one-argument constructor and an lnvoke() method.

a.

1, 2 and 3 only

b.

1, 3 and 5 only

c.

2 and 4 only

d.

4 only

Discuss
Answer: (b).1, 3 and 5 only
Q5.
Which of the following is the correct way to call the function MyFun() of the Sample class given below? 

class Sample
{
    public int MyFun(int i)
    {
        Console.WriteLine("Welcome to CompSciBits.com !" );
        return 0;
    }
}

a.

delegate void del(int i);
Sample s = new Sample();
deld = new del(ref s.MyFun);
d(10);

b.

delegate int del(int i);
Sample s = new Sample(.);
del = new delegate(ref MyFun);
del(10);

c.

Sample s = new Sample();
delegate void del = new delegate(ref MyFun);
del(10);

d.

delegate int del(int i);
del d;
Sample s = new Sample();
d = new del(ref s.MyFun);
d(10);

Discuss
Answer: (d).delegate int del(int i);
del d;
Sample s = new Sample();
d = new del(ref s.MyFun);
d(10);
Q6.
Which of the following is the correct way to call subroutine MyFun() of the Sample class given below? 

class Sample
{
    public void MyFun(int i, Single j)
    {
        Console.WriteLine("Welcome to CompSciBits !");
    }
}

a.

delegate void del(int i);
Sample s = new Sample();
del d = new del(ref s.MyFun);
d(10, 1.1f);

b.

delegate void del(int i, Single j);
del d;
Sample s = new Sample();
d = new del(ref s.MyFun);
d(10, 1.1f);

c.

Sample s = new Sample();
delegate void d = new del(ref MyFun);
d(10, 1.1f);

d.

delegate void del(int i, Single]);
Sample s = new Sample();
del = new delegate(ref MyFun);
del(10, 1.1f);

Discuss
Answer: (b).delegate void del(int i, Single j);
del d;
Sample s = new Sample();
d = new del(ref s.MyFun);
d(10, 1.1f);
Q7.
Which of the following statements are correct about a delegate?

1. Inheritance is a prerequisite for using delegates.
2. Delegates are type-safe.
3. Delegates provide wrappers for function pointers.
4. The declaration of a delegate must match the signature of the method that we intend to call using it.
5. Functions called using delegates are always late-bound.

a.

1 and 2 only

b.

1, 2 and 3 only

c.

2, 3 and 4 only

d.

All of the above

Discuss
Answer: (c).2, 3 and 4 only
Q8.
Which of the following statements are correct about delegates?

1. Delegates are not type-safe.
2. Delegate is a user-defined type.
3. Only one method can be bound with one delegate object.
4. Delegates can be used to implement callback notification.
5. Delegates permit execution of a method on a secondary thread in an asynchronous manner.

a.

1 and 2 only

b.

1, 2 and 3 only

c.

2, 4 and 5 only

d.

4 and 5 only

Discuss
Answer: (c).2, 4 and 5 only
Q9.
Which of the following statements are correct about delegates?

a.

Delegates cannot be used to call a static method of a class.

b.

Delegates cannot be used to call procedures that receive variable number of arguments.

c.

If signatures of two methods are same they can be called through the same delegate object.

d.

Delegates cannot be used to call an instance function. Delegates cannot be used to call an instance subroutine.

Discuss
Answer: (b).Delegates cannot be used to call procedures that receive variable number of arguments.
Q10.
Which of the following are the correct ways to declare a delegate for calling the function func() defined in the sample class given below? 

class Sample
{
    public int func(int i, Single j)
    {
        /* Add code here. */
    }
}

a.

delegate d(int i, Single j);

b.

delegate void d(int, Single);

c.

delegate int d(int i, Single j);

d.

delegate void (int i, Single j);

Discuss
Answer: (c).delegate int d(int i, Single j);
Page 1 of 7

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