IBM Sample Question

[Allan Tan]

With respect to User and Daemon threads:





This one is from IBM: which of the following are true?
a) Daemon threads can not be grouped together
b) The JVM can terminate program when only daemon threads are running
c) Running Daemon threads prevent a Java VM from terminating program
d) Running User threads prevent a JVM from terminating program

Needed help...

[Udayan Naik]

In my opinion , b) and d) are the correct answers.
a) Daemon threads can not be grouped together - FALSE.You can always create a new Thread that belongs to a particular ThreadGroup and call the setDaemon() method on that thread.
b) The JVM can terminate program when only daemon threads are running - TRUE.
c) Running Daemon threads prevent a Java VM from terminating program - FALSE.
d) Running User threads prevent a JVM from terminating program -TRUE.


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