Dan Chisholm's
Java Programmer Certification Mock Exam

Please Help Save a Tree!

The pages of this web site are not formatted to conserve paper, but my new book (ISBN: 0-9745862-0-X) is formatted to save paper, save your printer cartridge, save a loose-leaf binder, and save money. If you prefer to work my exams from printed pages, then give your printer a rest and buy my new book.

Today, you can find my book at BookSurge.com.

Are you a university student studying Java programming? Do you agree that my book would serve as a helpful workbook and companion to be used along with the Java fundamentals textbook that is currently being used in your class? If so, then please ask your professor to consider using my book in future classes.

If you have any questions or comments concerning my mock exams or my book, then please send an e-mail to me at scjpexam2000@yahoo.com.

I would also like to read your response to the following questions.

Question 1

class MCZ11 {
  public static void main (String[] args) {
    char a = '\c';  // 1
    char b = '\r';  // 2
    char c = '\"';  // 3
    char d = '\b';  // 4
    char e = '\'';  // 5
}}

A compile-time error is generated at which line?

a. 1
b. 2
c. 3
d. 4
e. 5
f. None of the above

Question 2

class GFM11{
  public static void main (String[] args) {
    int x,y,z;
    System.out.println(x+y+z);
}}

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

a. Prints nothing.
b. Prints an undefined value.
c. Prints: null
d. Prints: 0
e. Run-time error
f. Compile-time error
g. None of the above

Question 3

class MCZ27 {
  public static void main (String[] args) {
    char a = '\f';  // 1
    char b = '\n';  // 2
    char c = '\r';  // 3
    char d = '\l';  // 4
    char e = '\\';  // 5
}}

A compile-time error is generated at which line?

a. 1
b. 2
c. 3
d. 4
e. 5
f. None of the above

Question 4

class GRC4 {public static void main(String[] args) {}} // 1
class GRC5 {public static void main(String []args) {}} // 2
class GRC6 {public static void main(String args[]) {}} // 3

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

a. Compile-time error at line 1.
b. Compile-time error at line 2.
c. Compile-time error at line 3.
d. An attempt to run GRC4 from the command line fails.
e. An attempt to run GRC5 from the command line fails.
f. An attempt to run GRC6 from the command line fails.
g. None of the above

Question 5

class MCZ28 {
  public static void main (String[] args) {
    char a = '\b';  // 1
    char b = '\d';  // 2
    char c = '\f';  // 3
    char d = '\t';  // 4
    char e = '\"';  // 5
}}

A compile-time error is generated at which line?

a. 1
b. 2
c. 3
d. 4
e. 5
f. None of the above

Question 6

class GRC7 {public void main(String[] args) {}} // 1
class GRC8 {public void main(String []args) {}} // 2
class GRC9 {public void main(String args[]) {}} // 3

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

a. Compile-time error at line 1.
b. Compile-time error at line 2.
c. Compile-time error at line 3.
d. An attempt to run GRC7 from the command line fails.
e. An attempt to run GRC8 from the command line fails.
f. An attempt to run GRC9 from the command line fails.

Question 7

class MCZ29 {
  public static void main (String[] args) {
    char a = '\a';  // 1 
    char b = '\b';  // 2
    char c = '\f';  // 3
    char d = '\n';  // 4
    char e = '\r';  // 5  
}}

A compile-time error is generated at which line?

a. 1
b. 2
c. 3
d. 4
e. 5
f. None of the above

Question 8

class MCZ30 {
  public static void main (String[] args) {
    char a = '\t';  // 1
    char b = '\\';  // 2
    char c = '\?';  // 3
    char d = '\"';  // 4
    char e = '\'';  // 5  
}}

A compile-time error is generated at which line?

a. 1
b. 2
c. 3
d. 4
e. 5
f. None of the above

Question 9

Which of these words belongs to the set of Java keywords?

a. qualified
b. record
c. repeat
d. restricted
e. label
f. to
g. type
h. until
i. value
j. virtual
k. xor
l. None of the above

Question 10

class JJF1 {
  public static void main (String args[]) {
    System.out.print(Byte.MIN_VALUE+",");
    System.out.print(Byte.MAX_VALUE);
}}

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

a. Prints: 0,255
b. Prints: 0,256
c. Prints: -127,128
d. Prints: -128,127
e. Compile-time error
f. Run-time error
g. None of the above

Question 11

class GRC1 {public static void main(String[] args) {}}    // 1
class GRC2 {protected static void main(String[] args) {}} // 2
class GRC3 {private static void main(String[] args) {}}   // 3

What is the result of attempting to compile each of the three class declarations and invoke each main method from the command line?

a. Compile-time error at line 1.
b. Compile-time error at line 2.
c. Compile-time error at line 3.
d. An attempt to run GRC1 from the command line fails.
e. An attempt to run GRC2 from the command line fails.
f. An attempt to run GRC3 from the command line fails.

Question 12

class JJF2 {
  public static void main (String args[]) {
    System.out.print(Short.MIN_VALUE+",");
    System.out.print(Short.MAX_VALUE);
}}

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

a. Prints: -32767,32768
b. Prints: -32768,32767
c. Prints: 0,65535
d. Prints: 0,65536
e. Compile-time error
f. Run-time error
g. None of the above

Question 13

class JJF3 {
  public static void main(String args[]) {
    System.out.print(Integer.toBinaryString(Byte.MAX_VALUE)+",");
    System.out.print(Integer.toOctalString(Byte.MAX_VALUE)+",");
    System.out.print(Integer.toString(Byte.MAX_VALUE)+",");
    System.out.print(Integer.toHexString(Byte.MAX_VALUE));
}}

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

a. Prints: 1111111,177,127,7f
b. Prints: 11111111,377,256,ff
c. Compile-time error
d. Run-time error
e. None of the above

Question 14

class JJF4 {
  public static void main(String args[]) {
    System.out.print(Long.toHexString(Byte.MAX_VALUE)+",");
    System.out.print(Long.toHexString(Character.MAX_VALUE)+",");
    System.out.print(Long.toHexString(Short.MAX_VALUE));
}}

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

a. Prints: f,ff,7f
b. Prints: f,ff,ff
c. Prints: 7f,ffff,7fff
d. Prints: ff,ffff,ffff
e. Prints: 7fff,ffffff,7fffff
f. Prints: ffff,ffffff,ffffff
g. Compile-time error
h. Run-time error
i. None of the above

Question 15

class JJF5 {
  public static void main(String args[]) {
    System.out.print(Integer.toHexString(Integer.MIN_VALUE)+",");
    System.out.print(Integer.toHexString(Integer.MAX_VALUE));
}}

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

a. Prints: 0000,ffff
b. Prints: 00000000,ffffffff
c. Prints: 7fff,8000
d. Prints: 8000,7fff
e. Prints: 7fffffff,80000000
f. Prints: 80000000,7fffffff
g. Compile-time error
h. Run-time error
i. None of the above

Question 16

Which of these words belong to the set of Java keywords?

a. transient
b. serializable
c. runnable
d. run
e. volatile
f. externalizable
g. cloneable

Question 17

class GFM12 {
  static int x;                             // 1
  public static void main(String[] args) {  // 2
    int y;                                  // 3
    System.out.println("x="+x);             // 4
    System.out.println("y="+y);             // 5
}}

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

a. Compile-time error at line 1.
b. Compile-time error at line 2.
c. Compile-time error at line 3.
d. Compile-time error at line 4.
e. Compile-time error at line 5.
f. Run-time error
g. None of the above

Question 18

class GFM13 {
  static byte a; static short b; static char c;
  static int d; static long e; static String s;
  public static void main(String[] args) {
    System.out.println(a+b+c+d+e+s);
}}

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

a. Prints: 00000null
b. Prints: 00000
c. Prints: 0null
d. Prints: 0
e. Prints: null
f. Compile-time error
g. Run-time error
h. None of the above

Question 19

class GFM14 {
  static byte a; static short b; static char c;
  static int d; static long e; static String s;
  public static void main(String[] args) {
    System.out.println(a+","+b+","+(int)c+","+d+","+e+","+s);
}}

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

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

Question 20

class GFM15 {
  static int a; static float b; static double c;
  static boolean d; static String s;
  public static void main(String[] args) {
    System.out.println(a+","+b+","+c+","+d+","+s);
}}

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

a. Prints: 0,0,0,false,null
b. Prints: 0,0,0,false,
c. Prints: 0,0.0,0.0,false,null
d. Prints: 0,0.0,0.0,false,
e. Prints: 0,0.0,0.0,true,null
f. Prints: 0,0.0,0.0,true,
g. Prints: 0,0,0,true,null
h. Prints: 0,0,0,true,
i. Compile-time error
j. Run-time error
k. None of the above

Question 21

Which of these words belong to the set of Java keywords?

a. virtual
b. goto
c. ifdef
d. typedef
e. friend
f. struct
g. implements
h. union
i. const

Question 22

Which of these lists contains at least one word that is not a Java keyword?

a. abstract, default, if, private, this
b. do, implements, protected, boolean, throw
c. case, extends, int, short, try
d. import, break, double, exception, throws
e. byte, else, instanceof, return, transient
f. None of the above

Question 23

Which of these lists contains at least one word that is not a Java keyword?

a. interface, static, void, catch, final
b. char, strictfp, finally, long, volatile
c. native, super, class, float, while
d. const, for, new, switch, import
e. continue, finalize, goto, package, synchronized
f. None of the above

Question 24

class Identifiers {
  int i1;   // 1
  int _i2;  // 2
  int i_3;  // 3
  int #i4;  // 4
  int $i5;  // 5
  int %i6;  // 6
  int i$7;  // 7
  int 8i;   // 8
}

Compile-time errors are generated at which lines?

a. 1
b. 2
c. 3
d. 4
e. 5
f. 6
g. 7
h. 8
Copyright © 2002-2004, Dan Chisholm
All rights reserved.