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

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JAVA Threads
What will be the output after compiling and executing the following code?public class Test implements Runnable{ public static void main(String[] args) throws InterruptedException{ Thread a = new Thread(new Test()); a.start(); System.out.print("Begin"); a.join(); System.out.print("End"); } public void run(){ System.out.print("Run"); }}

"BeginEnd" is printed.
"BeginRunEnd" is printed.
Compilation fails.
An exception is thrown at runtime.
"BeginEndRun" is printed.

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JAVA Threads
What notifyAll() method do?

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

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