C# Inheritance Quiz – Answertopia

Welcome to the C# Inheritance Quiz! This quiz is designed to test your knowledge of one of the core concepts in object-oriented programming: inheritance. Inheritance allows classes to inherit properties and behaviors from other classes, enabling code reuse and extending functionality. You will explore topics such as base classes, subclasses, method overriding, the use of the base and override keywords, and how inheritance hierarchies work in C#.

What is the primary benefit of inheritance in C#?

It allows a class to inherit from multiple base classes.

It allows a class to inherit the properties and methods of a base class and extend its functionality.

It restricts a subclass from adding new members.

It forces all subclasses to redefine all methods of the base class.

None

What is a base class in C# inheritance?

The class that cannot be instantiated.

The class that always implements interfaces.

The class that is automatically abstract.

The class from which other classes are derived.

None

What is a subclass in C#?

A class that cannot be instantiated.

A class that inherits from multiple base classes.

A class that can only inherit private members.

A class that inherits from another class and can add its own functionality.

None

Which of the following is true about C# inheritance?

A class cannot inherit methods from a base class.

A class can inherit from a base class and an interface simultaneously.

A class can inherit from only one base class.

A class can inherit from multiple base classes.

None

How do you indicate that a class is inheriting from another class in C#?

Using a double colon (::) followed by the base class name.

Using a colon (:) followed by the base class name.

Using the keyword ‘inherits’.

Using the keyword ‘extends’.

None

What does the 'base' keyword do in a subclass constructor?

It calls the constructor of the base class.

It calls the constructor of the subclass.

It removes inherited members from the subclass.

It prevents the subclass from adding new members.

None

What is the purpose of overriding a method in a subclass?

To prevent the method from being used in the subclass.

To make the method private in the subclass.

To delete the base class method.

To provide a new implementation of a method inherited from the base class.

None

What keyword must be used in the base class method to allow it to be overridden?

static

virtual

override

public

None

What keyword is used in the subclass to override a method from the base class?

override

new

virtual

base

None

10.

What is the purpose of the 'base' keyword when calling a method from the base class?

It blocks access to the base class method.

It removes the method from the subclass.

It calls the method from the base class in the overridden method.

It hides the method in the base class.

None

11.

In the following class declaration, what is the role of 'SavingsAccount : BankAccount'?

public class SavingsAccount : BankAccount

It means both classes are abstract.

It means BankAccount is inheriting from SavingsAccount.

It means SavingsAccount and BankAccount are interfaces.

It means SavingsAccount is inheriting from BankAccount.

None

12.

Which of the following is true about constructors in inheritance?

The base class constructor cannot be called from a subclass.

The constructor of the base class can be called using the ‘base’ keyword in the subclass constructor.

The base class constructor is automatically overridden by the subclass constructor.

The base class constructor must be called explicitly using the ‘new’ keyword.

None

13.

Which of the following is required to override a method?

The method must be declared as ‘static’ in the subclass.

The method must have the same name as the base class but a different return type.

The method must not take any parameters.

The method in the base class must be marked as ‘virtual’ or ‘abstract’.

None

14.

What happens if you do not use the 'override' keyword when trying to override a method in C#?

The base class method will be deleted.

The method will be overridden automatically.

The code will not compile because the method must explicitly override the base method.

The base class method will be hidden, but not overridden.

None

15.

Which class is at the top of the class hierarchy in C#?

System.Base

System.Object

System.IO

System.Class

None

16.

What is single inheritance in C#?

A class can only implement one interface.

A class cannot override methods from a base class.

A class can inherit from multiple base classes.

A class can only inherit from one base class.

None

17.

What is one benefit of method overriding in inheritance?

It makes the method private to the subclass.

It allows a subclass to modify or extend the functionality of an inherited method.

It forces the base class to delete the original method.

It allows multiple classes to inherit from the same method.

None