question 9:
　　 what code placed after the comment:
     // start for loop
　　 would populate the elements of the array ia[] with values of the variables i ?

　　 public class lin{
　　 public static void main(string argv[]){
　　 lin l = new lin();
　　 l.amethod();
　　 }

　　 public void amethod(){
　　 int ia[] = new int[4];
　　 // start for loop
　　 {
　　 ia[i] = i;
　　 system.out.println(ia[i]);
　　 }
　　 }
　　 }

　　 a. for(int i=0; i

　　 b. for (int i=0; i

　　 c. for(int i=0; i<4; i++)

　　 d. for(int i=0; i

　　 question 10:
　　 consider the following code:
　　 integer s = new integer(9);
　　 integer t = new integer(9);
　　 long u = new long(9);
　　 which test would return true?
　 a. (s==u)

　　 b. (s==t)

　　 c. (s.equals(t))

　　 d. (s.equals(9))

　　 e. (s.equals(new integer(9))

　　 question 11:
　　 which of the following is successfully create an instance of the vector class and add an element?

　　 a. vector v = new vector(99);
　　 v[1]=99;

　　 b. vector v = new vector();
　　 v.addelement(99);

　　 c. vector v = new vector();
　　 v.add(99);

　　 d. vector v = new vector(100);
　　 v.addelement(“99”);

　　 question 12:
　　 what will happen when you attempt to compile and run the following code?

　　 class base{
　　 private void amethod(int ibase){
　　 system.out.println(“base.amethod”);
　　 }
　　 }

　　 class over extends base{
　　 public static void main(string argv[]){
　　 over o = new over();
　　 int ibase=0;
　　 o.amethod(ibase);
　　 }

　　 public void amethod(int iover){
　　 system.out.println(“over.amethod”);
　　 }
　　 }

　　 a. compile time error complaining that base.amethod is private

　　 b. runtime error complaining that base.amethod is private

　　 c. output of base.amethod

　　 d. output of over.amethod

　　 question 13:
　　 what will happen if you try to compile and run the following code?

　　 public class myclass
　　 public static void main(string arguments[]){
　　 amethod(arguments);
　　 }

　　 public void amethod(string[] arguments)
　　 system.out.println(arguments);
　　 system.out.println(arguments[1]);
　　 }
　　 }

　　 a. error can't make static reference to void amethod

　　 b. error method main not correct

　　 c. error array must include parameter

　　 d. error amethod must be declared with string

　　 question 14:
　　 if you wanted to find out where the position of the letter v (i.e. return 2) in the string s containing “java”, which of the following could you use?

　　 a. mid(2,s);

　　 b. charat(2);

　　 c. s.indexof(‘v');

　　 d. indexof(s,'v');

　　 question 15:
　　 what will happen when you attempt to compile and run the following code?

　　 public class bground extends thread{

　　 public static void main(string argv[]){
　　 bground b = new bground();
　　 b.run();
　　 }
　　 public void start(){
　　 for (int i=0;i<10;i++){
　　 system.out.println(“value of i=” + i);
　　 }
　　 }
　　 }
　　 a. a compile time error indicating that no run method is defined for the thread class

　　 b. a run time error indicating that no run method is defined for the thread class

　　 c. clean compile and at run time the values 0 to 9 are printed out

　　 d. clean compile but no output at runtime

　　 question 16:
　　 what will happen when you compile the following code?

　　 public class myclass{
　　 static int i;

　　 public static void main(string argv[]){
　　 system.out.println(i);
　　 }
　　 }

　　 a. error variable i may out have been initialized

　　 b. null

　　 c. 1

　　 d. 0（cn-java）