This week's book giveaway is in the OCPJP forum. We're giving away four copies of OCA/OCP Java SE 7 Programmer I & II Study Guide and have Kathy Sierra & Bert Bates on-line! See this thread for details.
What mock exam do you use. I saw similar question in EnthuWare mock exam, and people on their forum says that HttpSessionBindingListener is a correct answer for such questions. We can only hope not to encounter such questions in the real exam