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Test Bank For Building Java Programs A Back to Basics Approach 5th Edition By Stuart Reges, Marty Stepp (All Chapters, 100% Original Verified, A+ Grade)

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Building Java Programs A Back to Bas

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Building Java Programs A Back To Bas

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Building Java Programs A
Back to Basics Approach, 5e
Stuart Reges, Marty Stepp
(Test Bank All Chapters,
100% Original Verified, A+
Grade) Answers At The End
Of Each Chapter

Part 2: Final Exam: Page 2-207
Part 1: Midterm Exam : Page 208-370

, Part 2
Sample Final Exam #1
(Spring 2005; thanks to Stuart Reges)

1. Array Mystery
Consider the following method:

public static void arrayMystery(int[] a) {
for (int i = 1; i < a.length; i++) {
a[i] = i + a[i - 1] - a[i];
}
}

Indicate in the right-hand column what values would be stored in the array after the method arrayMystery executes
if the integer array in the left-hand column is passed as a parameter to it.

Original Contents of Array Final Contents of Array

int[] a1 = {7};
arrayMystery(a1); _____________________________

int[] a2 = {4, 3, 6};
arrayMystery(a2); _____________________________

int[] a3 = {7, 4, 8, 6, 2};
arrayMystery(a3); _____________________________

int[] a4 = {10, 2, 5, 10};
arrayMystery(a4); _____________________________

int[] a5 = {2, 4, -1, 6, -2, 8};
arrayMystery(a5); _____________________________

1 of 9

,2. Reference Semantics Mystery
The following program produces 4 lines of output. Write the output below, as it would appear on the console.

public class BasicPoint {
int x;
int y;

public BasicPoint() {
x = 2;
y = 2;
}
}

public class ReferenceMystery {
public static void main(String[] args) {
int a = 7;
int b = 9;
BasicPoint p1 = new BasicPoint();
BasicPoint p2 = new BasicPoint();

addToXTwice(a, p1);
System.out.println(a + " " + b + " " + p1.x + " " + p2.x);

addToXTwice(b, p2);
System.out.println(a + " " + b + " " + p1.x + " " + p2.x);
}

public static void addToXTwice(int a, BasicPoint p1) {
a = a + a;
p1.x = a;
System.out.println(a + " " + p1.x);
}
}

2 of 9

, 3. Inheritance Mystery
Assume that the following classes have been defined:

public class A extends B { public class C {
public void method2() { public String toString() {
System.out.print("a 2 "); return "c";
method1(); }
}
} public void method1() {
System.out.print("c 1 ");
public class B extends C { }
public String toString() {
return "b"; public void method2() {
} System.out.print("c 2 ");
}
public void method2() { }
System.out.print("b 2 ");
super.method2(); public class D extends B {
} public void method1() {
} System.out.print("d 1 ");
method2();
}
}

Given the classes above, what output is produced by the following code?

C[] elements = {new A(), new B(), new C(), new D()};
for (int i = 0; i < elements.length; i++) {
System.out.println(elements[i]);
elements[i].method1();
System.out.println();
elements[i].method2();
System.out.println();
System.out.println();
}

3 of 9

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