C# Polymorphism, Abstract, Interface, and Delegates Quiz
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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#?

    <p>Through method overloading and operator overloading</p> Signup and view all the answers

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

    <p>Many</p> Signup and view all the answers

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

    <p>Method overloading</p> Signup and view all the answers

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

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

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

    <p>If the method in the parent class has the keyword 'virtual'</p> Signup and view all the answers

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

    <p>Increases the flexibility and interoperability of programs</p> Signup and view all the answers

    When is polymorphic inheritance respected in object-oriented programming?

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

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

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

    What does an abstract method in an abstract class define?

    <p>Only the signature of the method with no body</p> Signup and view all the answers

    What does an interface define in C#?

    <p>The signature of functionality without implementation</p> Signup and view all the answers

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

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

    What does an interface provide in C#?

    <p>A way to achieve multiple inheritances indirectly</p> Signup and view all the answers

    What feature does polymorphism introduce into object-oriented programming?

    <p>The ability to treat objects of different types as objects of a common type</p> 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.

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