Certified Java Programmer Mock Exam

Question 1

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

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

Question 2

class A {
  public static void main (String[] args) {
    for (int i = 0; i < 4; i++) {
      switch (i) {
        case 0: System.out.print("A");
        case 1: System.out.print("B");
        case 2: System.out.print("C");
      }
    }
  }
}

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

Question 3

class Level1Exception extends Exception {}
class Level2Exception extends Level1Exception {}
class Level3Exception extends Level2Exception {}
class Purple {
  public static void main(String args[]) {
    int a,b,c,d,f,g,x;
    a = b = c = d = f = g = 0;
    x = 5;
    try {
      try {
	switch (x) {
          case 1: throw new Level1Exception();
          case 2: throw new Level2Exception();
          case 3: throw new Level3Exception();
          case 4: throw new Exception();
        }
        a++;
      }
      catch (Level2Exception e) {b++;}
      finally{c++;}
    }
    catch (Level1Exception e) { d++;}
    catch (Exception e) {f++;}
    finally {g++;}
    System.out.print(a+","+b+","+c+","+d+","+f+","+g);
  }
}

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

Question 4

class RedException extends Exception {}
class BlueException extends Exception {}
class White {
  void m1() throws RedException {throw new RedException();}
  public static void main (String[] args) {
    White white = new White();
    int a,b,c,d;
    a = b = c = d = 0;
    try {white.m1();a++;}
    catch (RedException e) {b++;}
    catch (BlueException e) {c++;}
    finally {d++;}
    System.out.print(a+","+b+","+c+","+d);
  }
}

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

Question 5

1. class A {
2.   void m1() {throw new ClassNotFoundException();}
3.   void m2() {throw new ArithmeticException();}
4.   void m3() {throw new ClassCastException();}
5.   void m4() {throw new IllegalArgumentException();}
6.   void m5() {throw new CloneNotSupportedException();}
7.   void m6() {throw new NoSuchFieldException();}
8. }

What is the result of attempting to compile the program?

Question 6

1. class A {
2.   void m1() {throw new IndexOutOfBoundsException();}
3.   void m2() {throw new InstantiationException();}
4.   void m3() {throw new IllegalAccessException();}
5.   void m4() {throw new NullPointerException();}
6.   void m5() {throw new NoSuchMethodException();}
7.   void m6() {throw new SecurityException();}
8. }

What is the result of attempting to compile the program?

Question 7

class Level1Exception extends Exception {}
class Level2Exception extends Level1Exception {}
class Level3Exception extends Level2Exception {}
class Brown {
  public static void main(String args[]) {
    int a, b, c, d, f;
    a = b = c = d = f = 0;
    int x = 1;

    try {
      switch (x) {
        case 1: throw new Level1Exception();
        case 2: throw new Level2Exception();
        case 3: throw new Level3Exception();
      }
      a++;
    }
    catch (Level3Exception e) { b++;}
    catch (Level2Exception e) { c++;}
    catch (Level1Exception e) { d++;}
    finally {f++;}
    System.out.print(a+","+b+","+c+","+d+","+f);
  }
}

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

Question 8

class Level1Exception extends Exception {}
class Level2Exception extends Level1Exception {}
class Level3Exception extends Level2Exception {}
class Purple {
  public static void main(String args[]) {
    int a,b,c,d,f,g,x;
    a = b = c = d = f = g = 0;
    x = 1;
    try {
      try {
        switch (x) {
          case 1: throw new Level1Exception();
          case 2: throw new Level2Exception();
          case 3: throw new Level3Exception();
        }
        a++;
      }
      catch (Level2Exception e) {b++;}
      finally{c++;}
    }
    catch (Level1Exception e) { d++;}
    catch (Exception e) {f++;}
    finally {g++;}
    System.out.print(a+","+b+","+c+","+d+","+f+","+g);
  }
}

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

Question 9

1. class A {
2.   void m1() {throw new ClassNotFoundException();}
3.   void m2() {throw new CloneNotSupportedException();}
4.   void m3() {throw new IllegalAccessException();}
5.   void m4() {throw new InstantiationException();}
6.   void m5() {throw new InterruptedException();}
7.   void m6() {throw new NoSuchMethodException();}
8. }

What is the result of attempting to compile the program?

Question 10

class A {
  public static void main (String[] args) {
    Object error = new Error();
    Object runtimeException = new RuntimeException();
    System.out.print((error instanceof Exception) + ",");
    System.out.print(runtimeException instanceof Exception);
  }
}

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

Question 11

class Red {
  public static void main(String args[]) {
    for (int i = 0; i<5 ;i++) {
      switch(i) {
        case 0: System.out.print("v ");break;
        case 1: System.out.print("w ");
        case 2: System.out.print("x ");break;
        case 3: System.out.print("y ");
        case 4: System.out.print("z ");break;
        default: System.out.print("d ");
      }
    }
  }
}

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

Question 12

class A {
  public static void main (String[] args) {
    Error error = new Error();
    Exception exception = new Exception();
    System.out.print((exception instanceof Throwable)  + ",");
    System.out.print(error instanceof Throwable);
  }
}

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

Question 13

class Orange {
  public static void main(String args[]) {
    byte b = -1;
    switch(b) {
      case 0:
        System.out.print("zero ");
      break;
      case 100:
        System.out.print("100 ");
      break;
      case 1000:
        System.out.print("1000 ");
      break;
      default: System.out.print("Default ");
    }
  }
}

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

Question 14

class Violet {
  public static void main(String args[]) {
    int x = -5;
    int success = 0;
    do  {
      switch(x) {
        case 0: System.out.print("0");
          x += 5; break;
        case 1: System.out.print("1");
          x += 3; break;
        case 2: System.out.print("2");
          x += 1; break;
        case 3: System.out.print("3");
          success++; break;
        case 4: System.out.print("4");
          x -= 1; break;
        case 5: System.out.print("5");
          x -= 4; break;
        case 6: System.out.print("6");
          x -= 5; break;
        default:
          x += x < 0 ? 2 : -2;
      }
    } while ((x != 3) || (success < 2));
  }
}

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

Question 15

class F {
  static int m1(String s, int i) {
    System.out.print(s + i);
    return i;
  }
  public static void main (String[] args) {
    int i = 0, j = 0, k = 0;
      do while (m1("i", ++i) < 2)
        System.out.print("k" + ++k);
      while (m1("j", ++j) < 2);
  }
}

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

Question 16

class I {
  public static void main (String[] args) {
    int i = 0, j = 9;
    do {
      if (j < 4) {
        break;
      } else if (j-- < 7) {
        continue;
      }
      i++;
    } while (i++ < 7);
    System.out.print(i + "," + j);
  }
}

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

Question 17

class A {
  public static void main (String[] args) {
    int j = 0;
      do for (int i = 0; i++ < 2;)
        System.out.print(i);
      while (j++ < 2);
  }
}

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

Question 18

class G {
  public static void main (String[] args) {
    int i = 0, j = 9;
    do {
      i++;
      if (j-- < i++) {
        break;
      }
    } while (i < 5);
    System.out.print(i + "," + j);
  }
}

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

Question 19

class C {
  public static void main (String[] args) {
    int j = 0;
    for (int i = 0; i++ < 2;) do
      System.out.print(i);
    while (j++ < 2);
  }
}

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