Certified Java Programmer Mock Exam

Question 1

class Green {
  public static void main(String args[]) {
    short[] s = {1, -1, 3, 4};
    for (int i = 0; i<s.length;i++) {
      switch(s[i]) {
        case 2-1: System.out.print("v ");
        break;
        case 'd'-'a': System.out.print("w ");
        break;
        case 0: System.out.print("x ");
        break;
        case ~0: System.out.print("y ");
        break;
        case 4&5: System.out.print("z ");
        break;
        default: System.out.print("Default ");
      }
    }
  }
}

What is the result of attempting to compile and run the above program?

Question 2

class Blue {
  public static void main(String args[]) {
    long[] l = {1, -1, 3, 4};
    for (int i = 0; i<l.length;i++) {
      switch(l[i]) {
        case 2-1: System.out.print("v ");
        break;
        case 'd'-'a': System.out.print("w ");
        break;
        case 0: System.out.print("x ");
        break;
        case ~0: System.out.print("y ");
        break;
        case 4&5: System.out.print("z ");
        break;
        default: System.out.print("Default ");
      }
    }
  }
}

What is the result of attempting to compile and run the above program?

Question 3

class Black {
  public static void main (String args[]) {
    int i = 0;
    int j = 0;
label1:
    while (i++<5) {
label2:
      for (;;) {
label3:
        do {
          System.out.print(i + j);
          switch (i+j++) {
            case 0: continue label3;
            case 1: continue label2;
            case 2: continue label1;
            case 3: break;
            case 4: break label3;
            case 5: break label2;
            case 6: break label1;
            default: break label1;
          }
        } while (++j<5);
      }
    }
  }
}

What is the result of attempting to compile and run the above program?

Question 4

class Brown {
  public static void main (String args[]) {
    int i = 0;
    int j = 0;
label1:
    while (1) {
label2:
      for (;;i++) {
label3:
        do {
          System.out.print(i + j);
          switch (i+j++) {
            case 0: continue label3;
            case 1: continue label2;
            case 2: continue label1;
            case 3: break;
            case 4: break label3;
            case 5: break label2;
            case 6: break label1;
            default: break label1;
          }
        } while (++j<5);
      }
    }
  }
}

What is the result of attempting to compile and run the above program?

Question 5

class A {
  public static void main (String[] args) {
    int i = 0,j = 0,m = 0,n = 0,p;
label1:
    try {
      do {
        m++;
        try {
          p = i + j + m + n;
          if (p>=5) break label1;
          n++;
        } finally {i++;}
      } while (m++ < 2);
    } finally {j++;}
    System.out.print(i + "," + j + "," + m + "," + n);
  }
}

What is the result of attempting to compile and run the above program?

Question 6

class Gray {
  public static void main (String args[]) {
    int i = 0;
    int j = 0;
    int k = 0;
label1:
    do {
      k++;
label2:
      do {
        j++;
label3:
        do {
          i++;
          System.out.print((i + j + k + ", "));
          switch ((i+j+k)) {
            case 3: continue label3;
            case 4: continue label2;
            case 5: continue label1;
            case 6: break;
            case 7: break label3;
            case 8: break label2;
            default: break label1;
	      }
        } while (i++ < 2);
      } while (j++ < 2);
    } while (k++ < 2);
  }
}

What is the result of attempting to compile and run the above program?

Question 7

class Gray {
  public static void main (String args[]) {
    int i = 0;
    int j = 0;
    int k = 0;
label1:
    do {
      k++;
label2:
      do {
        j++;
label3:
        do {
          i++;
          System.out.print((i + j + k + ", "));
          switch ((i+j+k)) {
            default: break label1;
            case 3: break label3;
            case 4: break label3;
            case 5: break label2;
            case 6: continue label3;
            case 7: continue label2;
            case 8: continue label2;
            case 9: continue label1;
	      }
        } while (i++ < 2);
      } while (j++ < 2);
    } while (k++ < 2);
  }
}

What is the result of attempting to compile and run the above program?