Certified Java Programmer Mock Exam

Question 1

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 2

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 3

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 4

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 5

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 6

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?

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

Question 7

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?

a.	Prints: 0,0
b.	Compile-time error at line 1.
c.	Compile-time error at line 1.
d.	Compile-time error at line 2.
e.	Compile-time error at line 3.
f.	Compile-time error at line 4.
g.	Compile-time error at line 5.
h.	Run-time error
i.	None of the above