Session 3

Which object is synchronized?

• Nothing

• this (the object the method belongs to)

• We can't tell from just this

When a thread leaves a synchronized block, other threads that want to enter it automatically try to do so.

• True

• False

In which state is a thread after we call .start()?

• NEW

• RUNNABLE

• NOT RUNNABLE

• TERMINATED

When does a thread leave the RUNNABLE state without entering the terminated state?

• After .run() finished executing

• When it becomes blocked or waiting

• After creating it, before we call .start()

• When we call .notRunnable()

If a thread enters a NOT RUNNABLE state because it .waits() on an object, how does it go back to the RUNNABLE state?

• It keeps checking if the object is no longer locked until it succeeds

• If .notify() or .notifyAll() is called

• After a certain amount of time it automatically happens

• If we call .start() on it

Can a thread call synchronized() on the same object multiple times?

• Yes

• No, this causes an exception

• No, this will make the program run forever

How can a thread become the owner of an object's monitor (lock)?

• By executing a method/block synchronized on the object

• By calling .wait() on the object

• Threads can't own monitors

To call .wait() or .notify() on an object, a thread has to own the monitor of that object.

• True

• False