Edit View History Bookmarks People Window Help x G strategy pattern Java bean cl

Question

Edit View History Bookmarks People Window Help x G strategy pattern Java bean cla x I Exam Mail M Gmail Google Docs an LinkedIn heBay o Soundcloud YouTube sc c canvas public class stubborn inplements Runnable t 'static Thread t1; static int x Si public void runo t1.getldCD) shoveX): currentThreadX) getrdio else pusho static synchronized void push() shoveO; static void shoveO system out printo H try Thread sleep(zaee catch (Exception e) public static void main(StringO args) ti nen Thread new Stubborn t1.starto new Thread(new StubbornO start() which are true? o the seepo invocation was removed, the chance of deadlock would decrease. o The program could deadlock The output could be 5,followed by deadlock. o The output is 543210 The output is 54321

Explanation / Answer

public class Stubborn implements Runnable {
static Thread t1;
static int x=5;
public void run(){
if(Thread.currentThread().getId() == t1.getId()) shove();
else push();
}
static synchronized void push() { shove();}
static void shove() {
synchronized(Stubborn.class){
System.out.print(x == + " ");
try { Thread.sleep(2000); } catch (Exception e) { ; }
if(x > 0) push();
}
}
public static void main(String[] args) {
t1 = new Thread(new Stubborn());
t1.start();
new Thread(new Stubborn()).start();
}
}

output:

Ans: The output could be 5,followed by deadlock.

Explanation: Deadlock is a situation where more than one threads are blocked forever, and waiting for each other. It occures when multiple threads need the same locks.

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