C# Polymorphism Quiz: Abstract, Interface, and Delegates Flashcards

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Questions and Answers

What is the definition of polymorphism in C#?

The ability of an object to take on many forms (correct)

The act of creating multiple objects from a single class

The concept of reusing code in a program

The process of converting an object to a different data type

How many types of polymorphism are there in C#?

One

Four

Three

Two (correct)

Which type of polymorphism in C# is achieved through method overriding and virtual methods?

Early binding

Dynamic polymorphism

Compile-time polymorphism

Runtime polymorphism (correct)

How is compile-time polymorphism achieved in C#?

Through method overloading and operator overloading Signup and view all the answers

What does the term 'poly' refer to in polymorphism?

Many Signup and view all the answers

In C#, what allows a class to have multiple methods with the same name but different parameters?

Method overloading Signup and view all the answers

What is the purpose of method overriding in object-oriented programming?

To allow a subclass to provide a specific implementation of a method already provided by its parent class Signup and view all the answers

When can a child class use the 'override' keyword in C#?

If the method in the parent class has the keyword 'virtual' Signup and view all the answers

What is the main benefit of polymorphism in object-oriented programming?

Increases the flexibility and interoperability of programs Signup and view all the answers

When is polymorphic inheritance respected in object-oriented programming?

When an object of the child class is referenced by the parent class Signup and view all the answers

Why might a root class be defined as an abstract class?

To serve as a conceptual idea without existing as a complete class Signup and view all the answers

What does an abstract method in an abstract class define?

Only the signature of the method with no body Signup and view all the answers

What does an interface define in C#?

The signature of functionality without implementation Signup and view all the answers

In C#, can a single class implement multiple interfaces?

Yes, multiple interfaces can be implemented by a single class Signup and view all the answers

What does an interface provide in C#?

A way to achieve multiple inheritances indirectly Signup and view all the answers

What feature does polymorphism introduce into object-oriented programming?

The ability to treat objects of different types as objects of a common type Signup and view all the answers

Study Notes

Introduction to Polymorphism in C#

Polymorphism in C# refers to the ability of an object to take on multiple forms.

Types of Polymorphism in C#

There are two main types of polymorphism in C#: compile-time polymorphism and runtime polymorphism.

Runtime Polymorphism in C#

Runtime polymorphism in C# is achieved through method overriding and virtual methods.

Compile-time Polymorphism in C#

Compile-time polymorphism in C# is achieved through method overloading.

Meaning of 'Poly' in Polymorphism

The term 'poly' in polymorphism refers to many or multiple.

Method Overloading in C#

Method overloading in C# allows a class to have multiple methods with the same name but different parameters.

Purpose of Method Overriding

The purpose of method overriding in object-oriented programming is to provide specific implementation of a method already provided by its parent class.

Using the 'override' Keyword in C#

A child class can use the 'override' keyword in C# when a parent class method is marked as virtual.

Benefit of Polymorphism

The main benefit of polymorphism in object-oriented programming is that it allows for more flexibility and generic code.

Polymorphic Inheritance

Polymorphic inheritance is respected in object-oriented programming when a child class provides a specific implementation of a method already provided by its parent class.

Abstract Classes

A root class might be defined as an abstract class when it provides common attributes and methods that can be inherited by child classes.

Abstract Methods

An abstract method in an abstract class defines a method signature that must be implemented by any non-abstract child class.

Interfaces in C#

An interface in C# defines a contract that must be implemented by any class that implements it.

Implementing Multiple Interfaces

A single class in C# can implement multiple interfaces.

Purpose of Interfaces

An interface in C# provides a way for a class to implement a specific behavior without having to inherit from a parent class.

Feature of Polymorphism

Polymorphism introduces the feature of method overriding or method overloading into object-oriented programming.

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Description

Test your knowledge on polymorphism, abstract classes, interfaces, and delegates in C# programming. This quiz covers concepts from Lecture 7 of CSE 222 course taught by Dr. Ahmed Samy Moursi.

C# Polymorphism, Abstract, Interface, and Delegates Quiz