JAVA Threads
Which keyword when applied on a method indicates that only one thread should execute the method at a time.

volatile
final
static
synchronized
native

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JAVA Threads
Predict the output:class A implements Runnable{ public void run(){ try{ for(int i=0;i<4;i++){ Thread.sleep(100); System.out.println(Thread.currentThread().getName()); } }catch(InterruptedException e){ } }}public class Test{ public static void main(String argv[]) throws Exception{ A a = new A(); Thread t = new Thread(a, "A"); Thread t1 = new Thread(a, "B"); t.start(); t.join(); t1.start(); }}

Compilation succeed but Runtime Exception
None of these
A B A B A B A B
Output order is not guaranteed
A A A A B B B B

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JAVA Threads
What notifyAll() method do?

Wakes up one threads that are waiting on this object's monitor
Wakes up all threads that are waiting on this object's monitor
None of these
Wakes up all threads that are not waiting on this object's monitor

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