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JavaRanch » Java Forums » Certification » Programmer Certification (SCJP/OCPJP)
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sheri
Ranch Hand

Joined: Sep 14, 2000
Posts: 43
hi

What might cause the current thread to stop executing?
A.

An InterruptedException is thrown
B.

The thread executes a sleep() call
C.

The thread constructs a new Thread
D.

A thread of higher priority becomes ready (runnable)
E.

The thread executes a read() call on an InputStream
to me the ans are:a,b,d
the ans given are:a,b,d,e

help please
sherin
srikrish
Ranch Hand

Joined: Sep 12, 2000
Posts: 63
Sherin,
During the read() call, the thread is still alive and listening for any input. It only goes into a waiting state. If the thread stops, then it wont be able to read the input. So, e is wrong.
Sandeep Potnis
Ranch Hand

Joined: Aug 18, 2000
Posts: 39
I think e is also right.
A thread goes from runnable state to blocked state with any I/O request and waits for the I/O to finish. Once the I/O is finished it goes to ready state and competes, for the processor's attention, with other threads in ready state.
rgds
Sandeep
Sandeep Potnis
Ranch Hand

Joined: Aug 18, 2000
Posts: 39
srikrish,
I saw your reply after posting mine. I think it depends what stopping a thread means. Does it mean Drop dead or Stop hogging the CPU ?
thanks Sandep
 
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