Inheritance and Polymorphism in Object-Oriented Programming
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Questions and Answers

What is the term used to describe a very general type of object with known characteristics?

  • Inheritance
  • Generalization (correct)
  • Specialization
  • Polymorphism

    • Which type of students are specialized versions of a general student?

  • Graduate students
  • Post-Graduated students
  • Under-Graduated students
  • All of the above (correct)

    • What is the relationship between a superclass and an inherited class called?

  • Polymorphism
  • Inheritance (correct)
  • Generalization
  • Specialization

    • Inheritance in object-oriented programming is used to create an 'is a' relationship among classes. What does this mean?

    <p>The subclass has all the characteristics of the superclass. (D)</p> Signup and view all the answers

    What does inheritance involve in object-oriented programming?

    <p>A superclass and a subclass. (C)</p> Signup and view all the answers

    What does a specialized object have in addition to the characteristics of the general object?

    <p>All of the characteristics of the general object, plus additional special characteristics. (D)</p> Signup and view all the answers

    In Java, what keyword is used to define a subclass?

    <p>extended (B)</p> Signup and view all the answers

    What happens to private members of a superclass in Java?

    <p>They are not inherited by the subclass (A)</p> Signup and view all the answers

    When a subclass is instantiated, which constructor is executed first in Java?

    <p>Superclass default constructor (D)</p> Signup and view all the answers

    What must a superclass provide if a parameterized constructor is defined in Java?

    <p>A no-arg constructor (C)</p> Signup and view all the answers

    What is the term for having a method with the same signature as a superclass method in Java?

    <p>Method overriding (B)</p> Signup and view all the answers

    Which keyword refers to an object's superclass in Java?

    <p>super (D)</p> Signup and view all the answers

    What happens to non-private methods of a superclass when an instance of the subclass is created in Java?

    <p>They may be directly accessed from the subclass (D)</p> Signup and view all the answers

    What annotation should be used before a subclass method declaration to indicate method overriding in Java?

    <p>@Override (D)</p> Signup and view all the answers

    In Java, when calling a superclass constructor, where should the call be placed within a subclass constructor?

    <p>Before any other statements within the constructor (B)</p> Signup and view all the answers

    What keyword is used on the class header to define the subclass of a class named 'Employee' in Java?

    <p>extend (C)</p> Signup and view all the answers

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