Inheritance in OOP
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Questions and Answers

What is the primary purpose of inheritance in object-oriented programming?

  • To create a hierarchy of classes that share properties and methods (correct)
  • To prevent code reuse
  • To rewrite code from one class to another
  • To create a new class from scratch

    • What is the term for the class being inherited from?

  • Derived class
  • Base class
  • Parent class (correct)
  • Child class

    • What type of relationship does inheritance represent?

  • Is-a relationship (correct)
  • Uses-a relationship
  • Has-a relationship
  • Part-of relationship

    • What is a benefit of using inheritance in programming?

    <p>It provides reusability of code</p> Signup and view all the answers

    What happens when a child class inherits from a parent class?

    <p>The child class gains all the attributes and methods of the parent class</p> Signup and view all the answers

    What is the term for the class that inherits from another class?

    <p>Derived class</p> Signup and view all the answers

    What will be the output of calling the Vehicle_info method on an object of the SportsCar class?

    <p>Inside Vehicle class</p> Signup and view all the answers

    Which type of inheritance is depicted when a SportsCar class is derived from a single base class Car, which in turn is derived from another base class Vehicle?

    <p>Multilevel inheritance</p> Signup and view all the answers

    What is Hybrid inheritance?

    <p>Combination of more than one type of inheritance</p> Signup and view all the answers

    What does it mean when instance variables of the parent class are declared as private?

    <p>They cannot be accessed outside the parent class</p> Signup and view all the answers

    What error will be encountered in the given code snippet?

    <p>AttributeError because '__d' is a private variable</p> Signup and view all the answers

    What is method overriding in inheritance?

    <p>Defining a method in the derived class with the same name and parameters as in the base class, but with different functionality</p> Signup and view all the answers

    Which type of inheritance allows for multiple derived classes from a single base class?

    <p>Hierarchical inheritance</p> Signup and view all the answers

    How is a private instance variable defined in a Python class?

    <p>Using two underscores before the variable name</p> Signup and view all the answers

    What does the super() function do in the context of the Student class?

    <p>It initializes the parent class properties.</p> Signup and view all the answers

    Which of these correctly defines a new attribute specific to the Student class?

    <p>self.graduationyear = 2019 in the <strong>init</strong> method</p> Signup and view all the answers

    How does the Student class inherit from the Person class?

    <p>Using class Student(Person):</p> Signup and view all the answers

    What is single inheritance?

    <p>When a child class inherits from only one parent class.</p> Signup and view all the answers

    Which method can be used to override the printname method in the Student class?

    <p>def printname(self):</p> Signup and view all the answers

    If you want to add a method exclusive to the Student class, where should it be defined?

    <p>Within the Student class</p> Signup and view all the answers

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