Java Inner Classes
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Questions and Answers

What is the primary benefit of using enums in Java?

  • To allow for multiple inheritance
  • To create abstract classes
  • To override the main method
  • To make the values type-safe (correct)
  • What is the type of nested class that requires an instance of the top-level class?

  • Abstract class
  • Static member class
  • Interface
  • Inner class (correct)
  • What is the enum type in the given program?

  • Price
  • Size (correct)
  • Pizza
  • Java
  • What is the purpose of the switch structure in the given program?

    <p>To display the prices of pizzas</p> Signup and view all the answers

    What is the number of types of nested classes in Java?

    <p>4</p> Signup and view all the answers

    What is the access level of a non-static member class to the top-level class?

    <p>To all data and methods</p> Signup and view all the answers

    What is the primary benefit of making an inner class private?

    <p>To hide its members from outside classes</p> Signup and view all the answers

    What is the advantage of using an inner class over a regular class?

    <p>It can access private members of its outer class</p> Signup and view all the answers

    Why would you not want to create an inner class in most cases?

    <p>Because it can only be used in the class it is defined in</p> Signup and view all the answers

    What is a common use case for inner classes in Java?

    <p>Implementing some built-in Java classes</p> Signup and view all the answers

    Can an outer class access the members of its inner class?

    <p>Yes, regardless of the inner class's access modifier</p> Signup and view all the answers

    What is the purpose of the public HouseData(String address, int sqFt) constructor?

    <p>To create a new instance of the <code>HouseData</code> class with specific values</p> Signup and view all the answers

    What is the primary reason for nesting a class inside another class?

    <p>To make the connection between classes easier to understand and maintain</p> Signup and view all the answers

    What is the access modifier of the HouseData class?

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

    What is the type of the price field in the RealEstateListing class?

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

    What is the purpose of the display method in the RealEstateListing class?

    <p>To display the details of the house</p> Signup and view all the answers

    What is the type of the listingNumber field in the RealEstateListing class?

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

    What is the purpose of the HouseData class?

    <p>To store the address and area of the house</p> Signup and view all the answers

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