Java Inheritance and Method Quiz

What is inheritance in Java?

• Creating a new class using an existing class

• Overloading methods

• Changing the behavior of a superclass

• Creating multiple instances of a class

How do we declare a PainterPlus class in the Painter superclass?

• public void painterplus extends painter

• public void PainterPlus extends Painter {

• public class PainterPlus extends Painter() {

• public class PainterPlus extends Painter {

True or False: A superclass can use methods from a subclass.

• True

• False

How do we instantiate an object in the PainterPlus class?

• PainterPlus = new PainterPlus();

• PainterPlus painter = new PainterPlus();

• new PainterPlus Painter();

• Painter painter = PainterPlus();

What is the correct while loop to make the painter continuously move until it can't?

• while (canMove()) { move();

  }

• while (canMove); { move();

  }

• while (isMoving()) { move();

  }

• while (canMove()) { stop();

  }

What is the correct syntax to write a method paintToEmpty that makes the painter paint until it runs out of paint?

• public void paintToEmpty() { while (hasPaint()) { paint(); } }

• public void paintToEmpty() { while (canPaint()) { paint(); } }

• public void paintToEmpty() { while (isPainting()) { paint(); } }

• public void paintToEmpty() { while (hasPaint()) { stop(); } }

Which keyword is used to inherit a class in Java?

• implements

• extends

• inherits

• super