This week's book giveaway is in the General Computing forum. We're giving away four copies of Arduino in Action and have Martin Evans, Joshua Noble, and Jordan Hochenbaum on-line! See this thread for details.
If you mean the 1.4 beta exam, it was not listed in the objectives. Someone who has already taken the exam said here that ThreadGroup wasn't on the test itself. I'm not concentrating on it, at least. Taking the 1.4 beta on Thursday. --