#9. SCJP/OCJP Exams Questions & Answers-

9. Given:

 class PingPong2 {

 synchronized void hit(long n) {

 for(int i = 1; i < 3; i++)

 System.out.print(n + "-" + i + " ");

 }

 }

 public class Tester implements Runnable {

 static PingPong2 pp2 = new PingPong2();

 public static void main(String[] args) {

 new Thread(new Tester()).start();

 new Thread(new Tester()).start();

 }

 public void run() {  pp2.hit(Thread.currentThread().getId()); }

 }

Which statement is true?

A. The output could be 5-1 6-1 6-2 5-2

B. The output could be 6-1 6-2 5-1 5-2

C. The output could be 6-1 5-2 6-2 5-1

D. The output could be 6-1 6-2 5-1 7-1

Correct Answer: B