This week's book giveaway is in the Mac OS forum. We're giving away four copies of a choice of "Take Control of Upgrading to Yosemite" or "Take Control of Automating Your Mac" and have Joe Kissell on-line! See this thread for details.
It does. He's probably just looking for more of them. I would suggest Wizlabs SCJP 6.0 program if you're going to end up purchasing a program to help prepare you. In that program you can have it quiz you on specific topics. If you are looking to go the free route I don't know what to use that seperates by topic.