QUESTION 1

1. What term is used to identify when an object hands off some functionality to another object?

   		Delegate
   		Client
   		Slave
   		Minion

2 points

QUESTION 2

1. Given the inheritance tree in the accompanying figure, which is a list of all subclasses?

   		UnpoweredVehicle, PoweredVehicle
   		UnpoweredVehicle, PoweredVehicle, Bicycle, Skateboard, Motorcycle, Car
   		Bicycle, Skateboard, Motorcycle, Car
   		Cannot be determined from the diagram

2 points

QUESTION 3

1. What is the output of the following code? public class Rectangle{ // Instance variables private double length; private double width; // Getters and setters for length and width public double getLength(){ return length; } public void setLength(double length){ this.length = checkData(length); } public double getWidth(){ return width; } public void setWidth(double width){ this.width = checkData(width); } // Constructor public Rectangle(double length, double width){ this.length = checkData(length); this.width = checkData(width); } // Error-checking method public double checkData(double val){ // If value is negative, make it positive if(val

   		Rectangle 1: Length: 4.0 Width: 2.0 Area: 8.0 Perimeter: 12.0 Rectangle 2: Length: 8.0 Width: 6.0 Area: 48.0 Perimeter: 28.0
   		Rectangle 1: Length: -4.0 Width: 2.0 Area: -8.0 Perimeter: -12.0 Rectangle 2: Length: 8.0 Width: 6.0 Area: 48.0 Perimeter: 28.0
   		Rectangle 1: Length: -4.0 Width: 2.0 Area: -8.0 Perimeter: -4.0 Rectangle 2: Length: 8.0 Width: 6.0 Area: 48.0 Perimeter: 28.0
   		Rectangle 1: Length: -4.0 Width: 2.0 Area: 8.0 Perimeter: 12.0 Rectangle 2: Length: 8.0 Width: 6.0 Area: 48.0 Perimeter: 28.0

2 points

QUESTION 4

1. In the following code, which lines make up all of the accessor methods? 0 public class Bus { 1 private BankAccount ba; 2 private double fuelLeft; 3 private final double FUEL_MAX = 40.0; 4 private final double FUEL_COST = 3.54; 5 public Bus(BankAccount baRef) { 6 fuelLeft = 0; 7 ba = baRef; 8 } 9 public void fillTank() { 10 double cost = (FUEL_MAX - fuelLeft) * FUEL_COST; 11 if (ba.pay(cost) == true) { 12 fuelLeft = FUEL_MAX; 13 } 14 } 15 public double getFuelLeft() { 16 return fuelLeft; 17 } 18 }

   		Lines 9-14
   		Lines 15-17
   		Lines 9-17
   		Lines 5-8

2 points

QUESTION 5

1. Which of the following is NOT an example of a best practice?

   		Using an Application Programming Interface (API)
   		Using inheritance
   		Using accessor methods
   		Using the Model-View-Controller design pattern

2 points

QUESTION 6

1. Variables whose scope is the entire class are called instance variables.

   True

   False

2 points

QUESTION 7

1. Which Java keyword forces all subclasses to create their own version of, or override, the method?

   		abstract
   		model
   		template
   		frame

2 points

QUESTION 8

1. Design patterns are just another name for best practices.

   True

   False

2 points

QUESTION 9

1. To use an inherited method, an object must be cast to the superclass before using that method.

   True

   False

2 points

QUESTION 10

1. The following HTML code is most likely in which tier of the Model-View-Controller design pattern?

   Program Calculates Area and Perimeter of Circles

   Enter the radius:

   		Model
   		View
   		Controller
   		Unable to determine