Welcome to the Interfaces,Inheritance and Polymorphism MCQs Page

Dive deep into the fascinating world of Interfaces,Inheritance and Polymorphism with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Interfaces,Inheritance and Polymorphism, a crucial aspect of C# programming. In this section, you will encounter a diverse range of MCQs that cover various aspects of Interfaces,Inheritance and Polymorphism, 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.


Check out the MCQs below to embark on an enriching journey through Interfaces,Inheritance and Polymorphism. 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 Interfaces,Inheritance and Polymorphism. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Interfaces,Inheritance and Polymorphism MCQs | Page 1 of 20

Which of the following statements is correct about the C#.NET code snippet given below?

interface IMyInterface
    void fun1(); 
    int fun2();
class MyClass: IMyInterface
    void fun1()
    { } 
    int IMyInterface.fun2()
    { } 
Answer: (d).The definition of fun1() in class MyClass should be void IMyInterface.fun1().
Which of the following can be declared in an interface?

1. Properties
2. Methods
3. Enumerations
4. Events
5. Structures
Answer: (b).1, 2, 4
A class implements two interfaces each containing three methods. The class contains no instance data. Which of the following correctly indicate the size of the object created from this class?
Answer: (b).24 bytes
Answer: (d).Properties can be declared inside an interface.
Answer: (b).Interfaces can be inherited.
Answer: (a).If a class implements an interface partially, then it should be an abstract class.
Answer: (c).A class that implements an interface can explicitly implement members of that interface.
Which of the following statements are correct about an interface in C#.NET?

1. A class can implement multiple interfaces.
2. Structures cannot inherit a class but can implement an interface.
3. In C#.NET, : is used to signify that a class member implements a specific interface.
4. An interface can implement multiple classes.
5. The static attribute can be used with a method that implements an interface declaration.
Answer: (a).1, 2, 3
Answer: (d).class MyClass: IMyInterface
double IMyInterface.MyFun(Single i)
// Some code
Answer: (c).Interfaces members are automatically public.
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