Mastering Object-Oriented Programming (OOP) Principles
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Questions and Answers

Which keyword in Java is used to declare a class that cannot be extended?

  • final (correct)
  • abstract
  • private
  • static

    • Which of the following is true about method overloading in Java?

  • It involves providing multiple implementations of the same method in a single class.
  • It allows you to provide multiple ways to call a method within the same class, based on different argument lists. (correct)
  • It allows a subclass to provide a specific implementation of a method defined in its superclass.
  • It is related to inheritance or subclassing.

    • Which type of polymorphism is also known as method overriding?

  • Static polymorphism
  • Runtime polymorphism (correct)
  • Dynamic polymorphism
  • Compile-time polymorphism

    • What is the primary reason for static typing in programming languages?

    <p>To rule out programs that might cause errors at runtime</p> Signup and view all the answers

    What is the difference between static typing and dynamic typing?

    <p>Static typing is about when type information is acquired at compile time, while dynamic typing acquires type information at runtime.</p> Signup and view all the answers

    Which one of these is NOT a main principle of Object-Oriented Programming (OOP)?

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

    What is polymorphism in the context of OOP?

    <p>The ability to create functions with the same name but different parameters</p> Signup and view all the answers

    Which type of polymorphism is achieved through method overloading?

    <p>Compile-time polymorphism</p> Signup and view all the answers

    What is the purpose of the render() method in the context of polymorphism?

    <p>To behave differently in different classes</p> Signup and view all the answers

    Which one of these is an example of method overriding in Java?

    <p>Defining a method in a child class with the same name as a method in the parent class</p> Signup and view all the answers

    Which of the following best describes method overriding in Java?

    <p>When a subclass overrides a method from its superclass and provides a specific implementation.</p> Signup and view all the answers

    What does the @Override annotation indicate in Java?

    <p>That a method in a subclass is intended to override a method with the same name and parameters in its superclass.</p> Signup and view all the answers

    What is the main advantage of covariant return types in Java?

    <p>They allow for more specific return types when overriding methods.</p> Signup and view all the answers

    What is the purpose of method overloading in Java?

    <p>To define multiple methods within the same class with the same name but different parameter lists.</p> Signup and view all the answers

    What is the method signature in Java?

    <p>The combination of a method's name and its parameter list.</p> Signup and view all the answers

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