CS A Unit 1 Review

Which of the following is a TRUE statement about constructors in Java?

• The constructor is used to create objects of a class.

• The constructor contains all of the methods that an object can utilize.

• Constructors should be made private to keep all information safe and secure.

• The constructor should not have the same name as the class.

• In inheritance, the parent class should always contain the keyword super.

A Painter object called myPainter is facing north. Consider the following code segment.

The effect of this code is that the myPainter object is now:

• facing north

• facing south

• facing east

• facing west

• in an infinite loop

A Painter object called myPainter is initially facing east. Consider the following code segment.

After the loop has terminated, which of the following MUST be true?

• The Painter object is blocked from moving north.

• The Painter object is blocked from moving south.

• The Painter object is blocked from moving east.

• The Painter object is blocked from moving west.

• The Painter object will crash into an object or wall.

Which of the following are inherited when one class extends another?

I. private attributes

II. public constructors

III. public methods

• I only

• III only

• I and II

• II and III

• I, II, and III

Consider the following code segment.

Which of the following is equivalent?

• 
• 
• 
• 
• None of these choices

Look at the following UML diagram for the Painter class.

Given a Painter object called myPainter, which method call would cause a syntax error?

• myPainter.move();

• myPainter.turnLeft();

• myPainter.takePaint();

• myPainter.canMove();

• myPainter.paint();

Which of the following correctly instantiates a new Painter object?

• Painter daVinci = new Painter();

• daVinci Painter = new Painter();

• Painter daVinci = Painter();

• Painter() daVinci = new Painter;

• Painter daVinci = Painter;

Consider the following code segment.

What is the name of the superclass?

• PainterPlus

• Painter

• SuperPainter

• MyNeighborhood

• turnRight()

Fill in the blank. Inheritance represents a/an ___ relationship.

• has-a

• has-many

• is-a

• is-many

• None of these

Consider the following class headers.

Which statement below is true regarding the class declarations?

I. Food is a subclass of Cookie

II. Dessert is a superclass of Cookie

III. Cookie is a subclass of Dessert

IV. Cookie is a superclass of Food

• I only

• III only

• I and II

• II and IV

• II and III