Certified Java Programmer Mock Exam

Question 1

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?

a. Prints: false,false
b. Prints: false,true
c. Prints: true,false
d. Prints: true,true
e. Compile-time error
f. Run-time error
g. None of the above

Question 2

class A {A() throws Exception {}} // 1
class B extends A {B() throws Exception {}} // 2
class C extends A {C() {}} // 3

Which of the following statements are true?

a. class A extends Object.
b. Compile-time error at 1.
c. Compile-time error at 2.
d. Compile-time error at 3.

Question 3

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?

a. Prints: false,false
b. Prints: false,true
c. Prints: true,false
d. Prints: true,true
e. Compile-time error
f. Run-time error
g. None of the above

Question 4

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?

a. Prints: 0,0,0,1,0,0
b. Prints: 0,0,1,1,0,1
c. Prints: 0,1,1,1,0,1
d. Prints: 1,0,1,1,0,1
e. Prints: 1,1,1,1,0,1
f. Compile-time error
g. Run-time error
h. None of the above

Question 5

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?

a. Prints: 0,0,1,0,0,1
b. Prints: 0,1,0,0,0,0
c. Prints: 0,1,1,0,0,1
d. Prints: 0,1,0,0,0,1
e. Prints: 1,1,1,0,0,1
f. Compile-time error
g. Run-time error
h. None of the above

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 = 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?

a. Prints: 1,1,1,0,0,1
b. Prints: 0,1,1,0,0,1
c. Prints: 0,1,0,0,0,0
d. Prints: 0,1,0,0,0,1
e. Prints: 0,0,1,0,0,1
f. Compile-time error
g. Run-time error
h. None of the above

Question 7

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?

a. Prints: 0,0,0,0,0,1
b. Prints: 0,0,0,0,1,0
c. Prints: 0,0,1,0,0,1
d. Prints: 0,0,1,0,1,1
e. Prints: 0,1,1,1,1,1
f. Prints: 1,1,1,1,1,1
g. Compile-time error
h. Run-time error
i. None of the above

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 = 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?

a. Prints: 1,0,0,0,0,0
b. Prints: 1,0,1,0,0,1
c. Prints: 0,0,1,0,0,1
d. Prints: 1,1,1,1,1,1
e. Compile-time error
f. Run-time error
g. None of the above

Question 9

class ColorException extends Exception {}
class WhiteException extends ColorException {}
class White {
  void m1() throws ColorException {throw new WhiteException();}
  void m2() throws 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 (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?

a. Prints: 0,1,0,0
b. Prints: 1,1,0,0
c. Prints: 0,1,1,0
d. Prints: 1,1,1,0
e. Prints: 1,1,1,1
f. Compile-time error
g. Run-time error
h. None of the above

Question 10

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?

a. Prints: 0,1,0,0
b. Prints: 1,1,0,1
c. Prints: 0,1,0,1
d. Prints: 0,1,1,1
e. Prints: 1,1,1,1
f. Compile-time error
g. Run-time error
h. None of the above

Question 11

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?

a. Prints: 0,1,0,0
b. Prints: 1,1,0,1
c. Prints: 0,1,0,1
d. Prints: 0,1,1,1
e. Prints: 1,1,1,1
f. Compile-time error
g. Run-time error
h. None of the above

Question 12

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?

a. Prints: 0,0,0,1,1
b. Prints: 0,0,1,1,1
c. Prints: 0,1,1,1,1
d. Prints: 1,1,1,1,1
e. Prints: 0,0,1,0,1
f. Prints: 0,1,0,0,1
g. Prints: 1,0,0,0,1
h. Compile-time error
i. Run-time error
j. None of the above

Question 13

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?

a. Prints: 0,0,0,1,1
b. Prints: 0,0,1,1,1
c. Prints: 0,1,1,1,1
d. Prints: 1,1,1,1,1
e. Prints: 0,0,1,0,1
f. Prints: 0,1,0,0,1
g. Prints: 1,0,0,0,1
h. Compile-time error
i. Run-time error
j. None of the above

Question 14

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?

a. Prints: 0,0,0,1,1
b. Prints: 0,0,1,1,1
c. Prints: 0,1,1,1,1
d. Prints: 1,1,1,1,1
e. Prints: 0,0,1,0,1
f. Prints: 0,1,0,0,1
g. Prints: 1,0,0,0,1
h. Compile-time error
i. Run-time error
j. None of the above

Question 15

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; 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?

a. Prints: 0,0,0
b. Prints: 0,0,1
c. Prints: 0,1,0
d. Prints: 0,1,1
e. Prints: 1,0,0
f. Prints: 1,0,1
g. Prints: 1,1,0
h. Prints: 1,1,1
i. Compile-time error
j. Run-time error
k. None of the above

Question 16

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?

a. Prints: 0,1,0,0
b. Prints: 1,1,0,1
c. Prints: 0,1,0,1
d. Prints: 0,1,1,1
e. Prints: 1,1,1,1
f. Compile-time error
g. Run-time error
h. None of the above

Question 17

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?

a. Prints: 1,1,1,0,0,1
b. Prints: 0,1,1,0,0,1
c. Prints: 0,1,0,0,0,0
d. Prints: 0,1,0,0,0,1
e. Prints: 0,0,1,0,0,1
f. Compile-time error
g. Run-time error
h. None of the above
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