Multithreading

Which method is used to start a thread in Java?

• run()
  

• begin()

• start()

• execute()

Which method is called when a thread is started?

• start()

• run()

• execute()

• init()

Which of the following is used to pause the execution of a thread for a specified time?

• sleep()

• wait()

• yield()

• join()

Which of the following will cause a thread to release the lock it holds?

• sleep()

• yield()

• wait()

• run()

What happens if you call start() on a thread object that has already been started?

• It runs normally

• It does nothing

• It throws IllegalThreadStateException

• It calls run() again

Which state is a thread in when it is waiting to acquire a lock held by another thread?

• RUNNABLE

• WAITING

• BLOCKED

• NEW

Which of these is not a valid thread state?

• NEW

• RUNNABLE

• DEAD

• EXECUTING

What does Thread.yield() do?

• Kills the thread

• Releases the lock

• 
  Pauses thread permanently

• Suggests the scheduler to switch to another thread

Which interface must be implemented to create a thread using Runnable?

• Thread

• Executor

• Runnable

• Callable

What happens if a thread is interrupted while sleeping?

• It continues sleeping

• It throws InterruptedException

• It goes to RUNNABLE state

• It terminates immediately