Certified Java Programmer Mock Exam

Question 1

class MCZ31 {
  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 2

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

Question 3

class MCZ13 {
  public static void main (String[] args) {
    String s = null;
    System.out.print(s);
}}

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

Question 4

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

Question 5

class MCZ15 {
  public static void main (String[] args) {
    float a = 1.1e1f;  // 1
    float b = 1e-1F;   // 2
    float c = .1e1f;   // 3
    double d = .1d;    // 4
    double e = 1D;     // 5
}}

A compile-time error is generated at which line?

Question 6

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

Question 7

class MCZ16 {
  public static void main (String[] args) {
    float a = 1;            // 1
    float b = 1L;           // 2
    float c = 1F;           // 3
    float d = 1.0;          // 4
}}

A compile-time error is generated at which line?

Question 8

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

Question 9

class MCZ17 {
  public static void main (String[] args) {
    String a = "\n";      // 1
    String b = "\r";      // 2
    String c = "\u000a";  // 3  \u000a = new line
    String d = "\u000d";  // 4  \u000d = return
}}

Compile-time errors are generated at which lines?

Question 10

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

Question 11

class MCZ18 {
  public static void main (String[] args) {
    String a = "abcd";          // 1
    String b = "'\u0041'";      // 2
    String c = "\u0041";        // 3
    String d = "\uD7AF";        // 4
    System.out.print(a+b+c+d);  // 5
}}

A compile-time error is generated at which line?

Question 12

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

Question 13

class MCZ20 {
  public static void main (String[] args) {
    // Insert code here.
}}

Which of the following lines can be inserted at the specified location without generating a compile-time error?

Question 14

class MCZ21 {
  public static void main (String[] args) {
    // Insert code here.
}}

Which of the following lines can be inserted at the specified location without generating a compile-time error?

Question 15

class MCZ24 {
  public static void main (String[] args) {
    char a = 061;      // 1
    char b = '\61';    // 2
    char c = '\061';   // 3
    char d = 0x0031;   // 4
    char e = '\u0031'; // 5
    System.out.print(""+a+b+c+d+e);
}}

A compile-time error is generated at which line?

Question 16

class MCZ25 {
  public static void main (String[] args) {
    char a = '\7';   // 1
    char b = '\61';  // 2
    char c = '\062'; // 3
    char d = '\x7';  // 4
    char e = '\x41'; // 5
    System.out.print(""+a+b+c+d+e);
}}

Compile-time errors are generated at which lines?

Question 17

Which of the following represent the full range of type char?

Question 18

Which of the following represent the full range of type char?

Question 19

class JJF6 {
  char c1 = 0xffff;  // 1
  char c2 = 0xfffff; // 2
  byte b1 = 0xffff;  // 3
  byte b2 = 0x7f;    // 4
  byte b3 = 0xff;    // 5
  byte b4 = -0x80;   // 6
}

Compile-time errors are generated at which lines?

Question 20

class MCZ19 {
  public static void main (String[] args) {
    String a1 = null;        // 1
    String b1 = 'null';      // 2
    String c1 = "null";      // 3
    String d1 = "'null'";    // 4
}}

A compile-time error is generated at which line?

Question 21

class MCZ22 {
  public static void main (String[] args) {
    // Insert code here.
}}

Which of the following lines will generate a compile-time error if inserted at the specified location?

Question 22

class MCZ23 {
  public static void main (String[] args) {
    // Insert code here.
}}

Which of the following lines can be inserted at the specified location without generating a compile-time error?

Question 23

class GFM16 {
  static int m1 (int i1, int i2) {
    int i3;
    if (i1 > 0) {i3 = i1 + i2;}
    return i3;
  }
  public static void main(String[] args) {
    System.out.println(m1(1,2));
}}

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

Question 24

class GFM17 {
  int x;                                    // 1
  public static void main(String[] args) {  // 2
    int y = 0;                              // 3
    System.out.print(x+",");                // 4
    System.out.print(y);                    // 5
}}

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