Certified Java Programmer Mock Exam

Question 1

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

What is the result of attempting to compile the program?

Question 2

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 = 3;
    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 3

class A {
  static boolean b;
  public static void main(String[] args) {
    if (b) {
      System.out.print("A");
    } else if (b = false) {
      System.out.print("B");
    } else if (b) {
      System.out.print("C");
    } else if (!b) {
      System.out.print("D");
    } else {
      System.out.print("E");
    }
  }
}

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

Question 4

class ColorException extends Exception {}
class WhiteException extends ColorException {}
class White {
  void m1() throws ColorException {throw new ColorException();}
  void m2() throws WhiteException {throw new WhiteException();}
  public static void main (String[] args) {
    White white = new White();
    int a,b,d,f;
    a = b = d = f = 0;
    try {white.m1();a++;} catch (WhiteException e) {b++;}
    try {white.m2();d++;} catch (WhiteException e) {f++;}
    System.out.print(a+","+b+","+d+","+f);
  }
}

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

Question 5

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

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

Question 6

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 = 4;
    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 7

class A {
  public static void main(String[] args) {
    boolean b = true;
    if (b = false) {
      System.out.print("A");
    } else if (b) {
      System.out.print("B");
    } else {
      System.out.print("C");
    }
  }
}

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

Question 8

class ColorException extends Exception {}
class WhiteException extends ColorException {}
class White {
  void m1() throws ColorException {throw new ColorException();}
  void m2() throws WhiteException {throw new ColorException();}
  public static void main (String[] args) {
    White white = new White();
    int a,b,d,f;
    a = b = d = f =0;
    try {white.m1();a++;} catch (ColorException e) {b++;}
    try {white.m2();d++;} catch (WhiteException e) {f++;}
    System.out.print(a+","+b+","+d+","+f);
  }
}

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

Question 9

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 = 2;

    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 10

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 = 2;
    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 11

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 = 4;

    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 12

class A {
  public static void main(String[] args) {
    boolean b;
    if (b = false) {
      System.out.print("A");
    } else if (b) {
      System.out.print("B");
    } else if (!b) {
      System.out.print("C");
    } else {
      System.out.print("D");
    }
  }
}

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

Question 13

class Purple {
  public static void main(String args[]) {
    int x = 6;
    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: System.out.print("Default ");
      }
    } while ((x != 3) || (success < 2));
  }
}

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

Question 14

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 {
      throw new Level1Exception();
      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 15

class E {
  public static void main (String[] args) {
    int i = 0, j = 0;
    while (i++ < 3) do
      System.out.print(j);
    while (j++ < 3);
  }
}

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

Question 16

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

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

Question 17

class D {
  public static void main (String[] args) {
    int i = 0, j = 0, k = 0;
    do while (i++ < 3)
      System.out.print(k++);
    while (j++ < 3);
  }
}

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

Question 18

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

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

Question 19

class A {
  public static void main (String args[]) {
    int h = 0, i = 0, j = 0, k = 0;
label1:
    for (;;) {
      h++;
label2:
      do {
        i++;
        k = h + i + j;
        switch (k) {
          default: break label1;
          case 1: continue label1;
          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?