About Question enthuware.ocpjp.v7.2.1254 :

[Student]

I answered c) because "When code running in some thread creates a new Thread object, the new thread...is a daemon thread if and only if the creating thread is a daemon".

It's not clear from the option whether "Threads created by user are always non-daemon threads." means
a) "Threads created by user [threads] can never be non-daemon threads" or
b) "Threads created by user [threads] are always created as non-daemon threads."

I took it to mean the latter, hence gave the wrong answer even though I knew the distinction. I hope I don't get such a question in the exam o-0

[icepeanuts]

FYI.

public final void setDaemon(boolean on)
Marks this thread as either a daemon thread or a user thread. The Java Virtual Machine exits when the only threads running are all daemon threads. This method must be invoked before the thread is started.

[krohani]

I answered c) because "When code running in some thread creates a new Thread object, the new thread...is a daemon thread if and only if the creating thread is a daemon".

It's not clear from the option whether "Threads created by user are always non-daemon threads." means
a) "Threads created by user [threads] can never be non-daemon threads" or
b) "Threads created by user [threads] are always created as non-daemon threads."

I took it to mean the latter, hence gave the wrong answer even though I knew the distinction. I hope I don't get such a question in the exam o-0

I agree that the wording on this question is ambiguous. I also took answer C - Threads created by the user are always non-daemon threads as the correct answer. I already know/knew that you can call setDaemon but that is an explicit call and by default all user threads are not daemon threads. Confusing wording in the answers.

[admin]

Updated to make it clear.
thank you for your feedback!