Question 6

Consider the following Java program, which is suppose to compute the transpose of a given 4 x 4 matrix M.

Note: there is an X in the program, which indicates some missing statements.

Choose the correct option to replace X in the program.

#include<java.util.*>
#define ROW 4
#define COL 4
int M[ROW][COL] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16};
main()
{
int i, j, t;
for (i = 0; i < 4; ++i)
{
X
}
for (i = 0; i < 4; ++i)
for (j = 0; j < 4; ++j)
System.out.println ("%d", M[i][j]);
}

3. What is printed to the screen when the following program is run? (6 points) public class Alias Test { public static void main(String[] args) { int) foo = {1,2,3,4,5}; int[] bar = {20, 21, 22, 23); int) chocolate = bar; bar[0] = 30; chocolate [1] = chocolate [0] + foo(0); System.out.println("Phase 1"); System.out.println (bar[0]); System.out.println (chocolate[0]); System.out.println (foo [0]); System.out.println (bar[1]); bar - foo; foo - chocolate; foo [31 - foo [2] + foo[1]; System.out.println("Phase 2"); System.out.println (foo [1]); System.out.println (foo [2]); System.out.println (foo [3]); foo = new int [10); foo [0] = 3; System.out.println("Phase 3"); System.out.println(chocolate[0]); System.out.println (chocolate[1]); System.out.println(chocolate[21); System.out.println(chocolate[3]); //WHAT IS PRINTED TO THE SCREEN IN THIS RUN? What is printed to the screen when the above program is run?

32. What is the first value printed by the program to the right? A.-1 B.1 0.2 D.8 E.10 void setup() { int[] data = { 7, 10, 3, io, 6, 7, 15, 10, 10 System.out.println(func1(10, data)); System.out.println(func1(7, data)); 1/ look close - this is not quite the // same function as before int funci(int x, int[] data) { for(int i = data.length-1; i >= 0; i--) if (data[i] == x) return i; return -1;

33. What is the second value printed by the program to the right? A.-1 B.O C.5 D.7 E.10 void setup() { int[] data = { 7, 10, 3, io, 6, 7, 15, 10, 10 System.out.println(func1(10, data)); System.out.println(func1(7, data)); 1/ look close - this is not quite the // same function as before int funci(int x, int[] data) { for(int i = data.length-1; i >= 0; i--) if (data[i] == x) return i; return -1;