Java Programming
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Questions and Answers

What is the purpose of the 'new' keyword in Java?

  • To initialize a variable with a new value
  • To declare a new class in the program
  • To define a new method in a class
  • To create a new object in memory (correct)
  • In Java, what is the default access modifier for instance variables?

  • Package-private (correct)
  • Private
  • Public
  • Protected
  • What is the role of a constructor in Java?

  • Returning a value from a method
  • Controlling access to class variables
  • Defining new methods in a class
  • Initializing the state of an object (correct)
  • How is an object created in Java?

    <p>Using the 'new' keyword followed by the class name and parentheses</p> Signup and view all the answers

    What is the purpose of declaring a reference variable for an object in Java?

    <p>To refer to the memory location of the object</p> Signup and view all the answers

    What is the purpose of the 'new' keyword in Java when creating an object?

    <p>Allocates memory for the object and returns a reference to it</p> Signup and view all the answers

    What is the default access modifier for instance variables in the Person class?

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

    What does it mean to 'manipulate objects' in Java?

    <p>Performing operations on the object's instance variables</p> Signup and view all the answers

    What is the role of a constructor in Java?

    <p>Initializing the object's instance variables</p> Signup and view all the answers

    Why is it necessary to declare a reference variable for an object in Java?

    <p>To store the memory address of the object</p> Signup and view all the answers

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