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.
You have to appear for Online tests like Whizlabs before exam. Main exam contains mainly 2 types of questions, 1. Drag and Drop questions 2. Multiple Choice Questions 2.1 Involve Code blocks 2.2 Select [one/two] correct statements. So if you want to feel comfortable in Main exam, better to give some online tests.