Certified Java Programmer Mock Exam

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?

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?

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?

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?

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?

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?

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?

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?

Question 9

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

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?

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?

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?

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?

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?

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?

Question 16

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

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?

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?

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?

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?

Question 21

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

Question 22

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

Question 23

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

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?