Java Classes and Object Orientation Concepts
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Questions and Answers

What is a key concept of object-oriented programming that is employed when creating Java classes?

  • Encapsulation (correct)
  • Abstraction
  • Polymorphism
  • Inheritance

    • When instantiating a class in Java, which term is typically used to refer to individual objects created from that class?

  • Procedures
  • Methods
  • Structures
  • Instances (correct)

    • What is the purpose of a constructor in a Java class?

  • To ensure that the class is abstract
  • To define the properties of a method
  • To initialize the attributes of an object (correct)
  • To execute static variables

    • Which keyword is used in Java to restrict access to class members to only the same class or package?

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

    In object-oriented programming, which term refers to the data elements that characterize an object or a class?

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

    What distinguishes an object from a class in Java?

    <p>A class defines a blueprint, while an object is an instance of that blueprint</p> Signup and view all the answers

    Which of the following best describes the purpose of messaging in object-oriented programming?

    <p>Communicating between objects</p> Signup and view all the answers

    What is a driver class in Java typically responsible for?

    <p>Creating objects from classes</p> Signup and view all the answers

    Which Java modifier is used to grant unrestricted access to a class member from any other class?

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

    What is the primary benefit of using encapsulation in Java?

    <p>Better data security</p> Signup and view all the answers

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