- InputStream access
Option A is correct.
notify() - wakes up a single thread that is waiting on this object's monitor.
Option B is wrong.
wait() causes the current thread to wait until another thread invokes the
notify() method or the
notifyAll() method for this object.
Option C is wrong. Methods of the InputStream class block until input data is available, the end of the stream is detected, or an exception is thrown. Blocking means that a thread may stop until certain conditions are met.
Option D is wrong.
sleep() - Causes the currently executing thread to sleep (temporarily cease execution) for a specified number of milliseconds. The thread does not lose ownership of any monitors.