JAVA Threads
What notifyAll() method do?

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

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JAVA Threads
What will happen when you attempt to compile and run the following code?1. public class Test extends Thread{2. public static void main(String argv[]){3. Test t = new Test();4. t.run();5. t.start();6. }7. public void run(){8. System.out.println("run-test");9. }10. }

Compilation fails due to an error on line 4
run-test
run-test run-test
Compilation fails due to an error on line 7
None of these

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JAVA Threads
What will happen after compiling and running following code?class A implements Runnable{ public void run(){ System.out.println("run-a"); }}1. public class Test{2. public static void main(String... args){3. A a = new A();4. Thread t = new Thread(a);5. t.start();6. t.start();7. }8. }

run-a
None of these
Compilation succeed but Runtime Exception
run-a run-a
Compilation fails with an error at line 6

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