Certified Java Programmer Mock Exam

Question 1

Which of the following are command-line switches used to enable assertions in non-system classes?

Question 2

Which of the following are command-line switches used to disable assertions in non-system classes?

Question 3

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 4

Which of the following are command-line switches used to disable assertions in non-system classes?

Question 5

Which of the following are command-line switches used to enable assertions in system classes?

Question 6

Which of the following statements are true?

Question 7

Which of the following is thrown to indicate that an assertion has failed?

Question 8

class JMM122 {
  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 program?

Question 9

class JMM123 {
  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 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 = 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 11

class JMM124 {
  public static void main(String args[]) {
    int k;
    for (int i=0, j=0; i<2; i++,j++) {System.out.print(i);}     // 1
    for (int i=0, k=0; i<2; i++,k++) {System.out.print(i);}     // 2
    for (int i=0, int j=0; i<2; i++,j++) {System.out.print(i);} // 3
}}

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

Question 12

class JMM125 {
  static int i;
  public static void main(String args[]) {
    for (i=1; i<3; i++) {System.out.print(i);}     // 1
    for (int i=1; i<3; i++) {System.out.print(i);} // 2
    int i;                                         // 3
    for (i=0; i<2; i++) {System.out.print(i);}     // 4
    System.out.print(JMM125.i);
}}

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

Question 13

class JMM126 {
  static int i;
  public static void main(String args[]) {
    for (i=1; i<3; i++)     {System.out.print(i);} // 1
    for (int i=1; i<3; i++) {System.out.print(i);} // 2
    int i;                                         // 3
    for (int i=0; i<2; i++) {System.out.print(i);} // 4
    System.out.print(JMM126.i);
}}

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

Question 14

class JMM114 {
  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 program?

Question 15

class JMM115 {
  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 program?

Question 16

class JMM116 {
  static int m1(String s, int i) {
    System.out.print(s + i);
    return i;
  }
  public static void main (String[] args) {
    int j = 0;
    for (int i = m1("A",0); m1("B",i) < 2; m1("C",++i)) {
      m1("J",++j);
    }
}}

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

Question 17

class JMM117 {
  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 program?

Question 18

class JMM118 {
  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 program?

Question 19

class JMM119 {
  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 program?

Question 20

class JMM120 {
  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 program?

Question 21

class JMM121 {
  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 program?