This week's giveaway is in the EJB and other Java EE Technologies forum. We're giving away four copies of EJB 3 in Action and have Debu Panda, Reza Rahman, Ryan Cuprak, and Michael Remijan on-line! See this thread for details.
Hi Radouane In my exam there wasn't a specific question on ThreadGroup and I guess that it isn't there, but I am not sure. You can get to know more about ThreadGroup from here and here. All I got in the exam was how to use it in a Thread constructor.