Question 1

Consider the following statements. public class Rectangle { private double length; private double width; public Rectangle() { length = 0; width = 0; } public Rectangle(double l, double w) { length = l; width = w; } public void set(double l, double w) { length = l; width = w; } public void print() { System.out.println("Length = " + length + "; Width = " + width + " " + + " Area = " + area() + "; Perimeter = " + perimeter()); } public double area() { return length * width; } public void perimeter() { return 2 * length + 2 * width; } public void makeCopy(Rectangle otherRect) { length = otherRect.length; width = otherRect.width } }

Rectangle tempRect = new Rectangle(14, 10); Rectangle newRect = new Rectangle(9, 5); What are the values of the instance variables of newRect after the following statement execute? newRect.makeCopy(tempRect);

		length = 14; width = 10
		length = 9; width = 5
		length = 14; width = 5
		None of these

1 points

Question 2

ADTs illustrate the principle of ____.

		information hiding
		privacy
		encapsulation
		overloading

1 points

Question 3

MysteryClass

-first: int -second: double;

+MysteryClass() +MysteryClass(int) +MysteryClass(double); +MysteryClass(int, double) +setData(int, double): void +getFirst(): int +getSecond(): double +doubleFirst(): int +squareSecond(): double +print(): void +equals(MysteryClass): boolean +makeCopy(MysteryClass): void +getCopy():MysteryClass

Which of the following would be a default constructor for the class MysteryClass shown in the accompanying figure?

		public MysteryClass(){ setData(0, 0.0); }
		public MysteryClass(0, 0.0) { setData(); }
		public MysteryClass(0) { setData(0, 0.0); }
		private MysteryClass(10){ setData(); }

1 points

Question 4

MysteryClass

-first: int -second: double;

+MysteryClass() +MysteryClass(int) +MysteryClass(double); +MysteryClass(int, double) +setData(int, double): void +getFirst(): int +getSecond(): double +doubleFirst(): int +squareSecond(): double +print(): void +equals(MysteryClass): boolean +makeCopy(MysteryClass): void +getCopy():MysteryClass

According to the UML class diagram in the accompanying figure, which of the following is a private member of the classMysteryClass?

		doubleFirst
		MysteryClass
		second
		print

1 points

Question 5

Which of the following class definitions is correct in Java? (i) public class Employee { private String name; private double salary; private int id; public Employee() { name = ""; salary = 0.0; id = 0; } public Employee(String n, double s, int i) { name = n; salary = s; id = i; } public void print() { System.out.println(name + " " + id + " " + salary); } }

(ii)

public class Employee { private String name; private double salary; private int id; public void Employee() { name = ""; salary = 0.0; id = 0; } public void Employee(String n, double s, int i) { name = n; salary = s; id = i; } public void print() { System.out.println(name + " " + id + " " + salary); } }

		Only (i)
		Only (ii)
		Both (i) and (ii)
		Neither is correct

1 points

Question 6

Class members consist of all of the following EXCEPT ____.

		named constants
		variable declarations
		pre-defined methods
		methods