C# Inheritance Questions with Answers | Page 3

C# Inheritance questions with answers are key for understanding object-oriented programming concepts in C#. Inheritance allows one class to acquire properties and methods of another, promoting code reusability and modular design. These programming questions and answers with explanations are often featured in technical interview Q&A for companies like Microsoft, Cognizant, and TCS. Practicing C# MCQs on inheritance helps learners grasp concepts like base and derived classes, access modifiers, method overriding, and polymorphism. Regular practice using C# programming interview questions with answers ensures strong command over object-oriented design principles for both academic and professional success.

Showing 10 of 29 questions

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Q21

What is the purpose of the "new" keyword when used with inheritance?

A To override a base method
B To hide a base method
C To create a new instance
D To call base class method

Answer: Option B

Explanation: The new keyword hides a method from the base class rather than overriding it.

Q22

Which type of class can have abstract methods?

A Sealed class
B Static class
C Abstract class
D Any class

Answer: Option C

Explanation: Only abstract classes can contain abstract methods that must be implemented by derived classes.

Q23

What is polymorphism in the context of inheritance?

A Multiple methods with same name
B Ability to take many forms
C Hiding implementation details
D Creating multiple classes

Answer: Option B

Explanation: Polymorphism allows methods to behave differently based on the object type at runtime.

Q24

Which method is called when an object is created in C#?

A Main()
B Constructor
C Destructor
D Initialize()

Answer: Option B

Explanation: Constructors are special methods called automatically when objects are instantiated.

Q25

What is the default access modifier for class members in C#?

A public
B private
C internal
D protected

Answer: Option B

Explanation: In C#, class members have private access by default if no access modifier is specified.

Q26

Which inheritance type allows a class to inherit from multiple interfaces?

A Single inheritance
B Multiple inheritance
C Multilevel inheritance
D Hierarchical inheritance

Answer: Option B

Explanation: C# supports multiple interface inheritance where a class can implement multiple interfaces.

Q27

What is the purpose of the "this" keyword in inheritance?

A Call base class constructor
B Refer to current instance
C Create new object
D Call static methods

Answer: Option B

Explanation: The this keyword refers to the current instance of the class and can be used to access current class members.

Q28

Which concept allows a derived class to have multiple base classes through different paths?

A Polymorphism
B Encapsulation
C Diamond problem
D Abstraction

Answer: Option C

Explanation: Diamond problem occurs when a class inherits from multiple classes with common ancestry.

Q29

What is method overriding in inheritance?

A Creating new method with same name
B Hiding base class method
C Providing specific implementation in derived class
D Making method private

Answer: Option C

Explanation: Method overriding allows a derived class to provide a specific implementation of a method that is already defined in its base class.

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