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

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JAVA Threads
What notifyAll() method do?

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

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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"); }}

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

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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(); }}

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

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