CSAwesome2 AP CSA Java 2025+

public int m1 (int a)
{
   if (a == 1)
      return 10;
   else
      return 10 + m1 (a – 1);
}

for (int j = 1; j <= 3; j++)
{
   for (int k = 1; k < 4; k++)
      System.out.print(j * k + " ");
}

public int mystery(int n)
{
   if (n == 0)
       return 1;
   else
       return 2 * mystery (n - 1);
}

Integer int1 = new Integer(3);
Integer int2 = new Integer(3);
Integer int3 = int2;

I. (int3.equals(int2))
II. (int1.equals(int2))
III. (int3 == int2)
IV. (int1 == int2)
V. (int2 == int3)

Data set 1: "aba", "abba", "aBa", "z"
Data set 2: "bcb", "bcd", "c"

1
22
333
4444
55555

I.

for (int i = 0; i < 5; i++)
{
   for (int j = 0; j < i; j++)
   {
      System.out.print(i);
   }
   System.out.println();
}

II.

for (int i = 1; i < 5; i++)
{
   for (int j = i; j > 0; j--)
   {
      System.out.print(i);
   }
   System.out.println();
}

III.

for (int i  = 1; i <= 5; i++)
{
   for (int j = i; j > 0; j--)
   {
      System.out.print(i);
   }
   System.out.println();
}

IV.

for (int i = 1; i < 6; i++)
{
   for (int j = 0; j < i; j++)
   {
      System.out.println(i);
   }
}

V.

for (int i = 0; i < 5; i++)
{
   for (int j = 0; j < i; j++)
   {
      System.out.print(i+1);
   }
   System.out.println();
}

List<Integer> list1 = new ArrayList<Integer>();
list1.add(new Integer(5));
list1.add(new Integer(4));
list1.add(new Integer(3));
list1.set(2, new Integer(2));
list1.add(2, new Integer(1));
list1.add(new Integer(0));
System.out.println(list1);

 public class TimeRecord
 {
    private int hours;
    private int minutes; // 0<=minutes<60

    public TimeRecord(int h, int m)
    {
       hours = h;
       minutes = m;
    }

    // postcondition: returns the number of hours
    public int getHours()
    { /* implementation not shown */ }

    // postcondition: returns the number
    // of minutes; 0 <= minutes < 60
    public int getMinutes()
    { /* implementation not shown */ }

    // precondition: h >= 0; m >= 0
    // postcondition: adds h hours and
    // m minutes to this TimeRecord
    public void advance(int h, int m)
    {
       hours = hours + h;
       minutes = minutes + m;
       /* missing code */
    }

    // ... other methods not shown
 }

 // Consider the following declaration that appears in a client program:

 TimeRecord[] timeCards = new TimeRecord[100];


// Assume that timeCards has been initialized with TimeRecord
// objects. Consider the following code segment that is intended to compute
// the total of all the times stored in timeCards.

 TimeRecord total = new TimeRecord(0,0);
 for (int k = 0; k < timeCards.length; k++)
 {
    /* missing expression */
 }

 Which of the following can be used to replace /* missing expression */ so that the code segment will work as intended?

 I.
    total.advance(timeCards[k].getHours(), timeCards[k].getMinutes());

 II.
    timeCards[k].advance();

 III.
    total += timeCards[k].advance();

 IV.
    total.advance(timeCards[k].hours, timeCards[k].minutes);

 V.
    timeCards[k].advance(timeCards[k].getHours(), timeCards[k].getMinutes());

public int m1(int[] a)
{
   a[1]--;
   return (a[1] * 2);
}

int a = 10, b = 3, t;
for (int i=1; i<=6; i++)
{
   t = a;
   a = i + b;
   b = t - i;
}

String s1 = "Hi There";
String s2 = s1;
String s3 = s2;
String s4 = s1;
s2 = s2.toLowerCase();
s3 = s3.toUpperCase();
s4 = null;

int[][] matrix = { {1,1,2,2},{1,2,2,4},{1,2,3,4},{1,4,1,2}};

int sum = 0;
int col = matrix[0].length - 2;
for (int row = 0; row < 4; row++)
{
   sum = sum + matrix[row][col];
}

int [][] mat = new int [3][4];
for (int row = 0; row < mat.length; row++)
{
   for (int col = 0; col < mat[0].length; col++)
   {
      if (row < col)
         mat[row][col] = 3;
      else if (row == col)
         mat[row][col] = 2;
      else
         mat[row][col] = 1;
   }
}

for ( int k = 0; k < a.length; k++ )
{
   while ( a[ k ] < temp )
   {
      a[ k ] *= 2;
   }
}

 public static void conditionTest(int num1, int num2)
 {
    if ((num1 > 0) && (num2 > 0))
    {
       if (num1 > num2)
          System.out.println("A");
       else
          System.out.println("B");
    }
    else if ((num2 < 0) || (num1 < 0))
    {
        System.out.println("C");
    }
    else if (num2 < 0)
    {
       System.out.println("D");
    }
    else
    {
       System.out.println("E");
    }
}