Object-Oriented Programming: Polymorphism and Inheritance
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Questions and Answers

What is the primary purpose of method overriding in polymorphism?

  • To create a new method in the child class
  • To modify the parent class code
  • To extend the functionality of an inherited method (correct)
  • To delete the parent class method

    • What happens when we call a method in polymorphism?

  • Python checks the parent class type
  • Python checks the child class type
  • Python checks the object’s class type (correct)
  • Python checks the method name

    • What is the advantage of method overriding when a parent class has multiple child classes?

  • It allows one child class to redefine the method while others use the parent class method (correct)
  • It allows all child classes to have the same method implementation
  • It allows the parent class to have multiple methods
  • It allows all child classes to modify the parent class code

    • What is the process of re-implementing the inherited method in the child class known as?

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

    What is the main concept used with inheritance in polymorphism?

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

    What is the benefit of using method overriding in polymorphism when the method inherited from the parent class doesn’t fulfill the need of a child class?

    <p>We can re-implement the method in the child class in a different way</p> Signup and view all the answers

    What is the primary advantage of using inheritance in programming?

    <p>To promote the reusability of code</p> Signup and view all the answers

    What is the relationship between a Car class and a Vehicle class in the example provided?

    <p>Car is a child class and Vehicle is a parent class</p> Signup and view all the answers

    What is polymorphism in the context of object-oriented programming?

    <p>A concept that allows for the same function to act differently depending on the context</p> Signup and view all the answers

    What is the main difference between method overloading and method overriding?

    <p>Method overloading is used when multiple methods have the same name but different parameters, while method overriding is used when a subclass provides a different implementation of a method from its parent class</p> Signup and view all the answers

    What is the purpose of the parent class in inheritance?

    <p>To provide a blueprint for the child class</p> Signup and view all the answers

    What is the result of a child class inheriting the properties of a parent class?

    <p>The child class acquires all the data members, properties, and functions from the parent class</p> Signup and view all the answers

    What is the primary benefit of using the super() function in Python?

    <p>To enable code reusability and simplify access to parent class methods</p> Signup and view all the answers

    What is the concept called when a child class redefines a method with the same name, parameters, and return type as a method in its parent class?

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

    What is an example of polymorphism in real-life?

    <p>A person acting as an employee and a wife</p> Signup and view all the answers

    How does the built-in function len() exhibit polymorphism in Python?

    <p>It calculates the length of an object based on its type</p> Signup and view all the answers

    What is the primary purpose of method overriding in Python?

    <p>To provide additional functionality to a parent class method</p> Signup and view all the answers

    What is the key characteristic of polymorphism in Python?

    <p>Ability to perform the same action in different ways</p> Signup and view all the answers

    Why is method overriding an essential concept in object-oriented programming?

    <p>It enables polymorphism and allows for more flexibility in coding</p> Signup and view all the answers

    What is the result of using the super() function in a child class?

    <p>The child class accesses the parent class methods without specifying the parent class name</p> Signup and view all the answers

    Study Notes

    Polymorphism with Inheritance

    • Polymorphism is mainly used with inheritance, allowing child classes to override methods of parent classes with the same name.
    • Method overriding is the process of re-implementing an inherited method in a child class in a different way.

    Inheritance

    • Inheritance is the process of inheriting properties of a parent class into a child class.
    • The parent class is also called the base class, and the child class is also called the subclass or derived class.
    • The main purpose of inheritance is the reusability of code.
    • A child class acquires all data members, properties, and functions from the parent class.
    • A child class can also provide its specific implementation to the methods of the parent class.

    Benefits of Inheritance

    • Code reusability, as we can use the existing class to create a new class instead of creating it from scratch.

    Python super() Function

    • The super() function is used to refer to the parent class in a child class.
    • Benefits of using the super() function include:
      • No need to remember or specify the parent class name to access its methods.
      • Can be used in both single and multiple inheritances.
      • Supports code reusability as there is no need to write the entire function.

    Method Overriding

    • Method overriding is the concept of redefining a method in a child class that has the same name, same parameters, and same return type as a method in its superclass.
    • The child class can extend additional functions in the child class that are not available in the parent class.
    • Example: a child class Car redefines the method max_speed() that is available in the parent class Vehicle.

    Polymorphism in Python

    • Polymorphism in Python is the ability of an object to take many forms.
    • It allows us to perform the same action in many different ways.
    • Example: the built-in function len() calculates the length of an object depending upon its type, such as a string or a list.

    Module 5 Objectives

    • Define Inheritance and Polymorphism.
    • Discuss the syntax and program structure of Inheritance.
    • Demonstrate application programs on inheritance.
    • Discuss the types of inheritance.
    • Demonstrate application programs on the different types of inheritance.
    • Introduce the concept of polymorphism.
    • Discuss the concept of overloading and Overriding.
    • Demonstrate application programs on overloading and overriding.

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    Related Documents

    CMPE-103-Module-5-Inheritance-and-Polymorphism.pdf

    Description

    Test your understanding of polymorphism and inheritance in object-oriented programming, including method overriding and property inheritance.

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