You should review the exam blueprint, which is freely downloadable. This will explain what you are expected to know. I would point out that there are also study guides for the 101 and that there is an active and very helpful LinkedIn group for F5 certification. https://www.linkedin.com/groups/85832
If the questions themselves are made known, F5 will retire the exam until it can be rewritten, as studying for the questions defeats the purpose of the certification exam. As such, people who have taken the exam are not permitted to discuss the questions themselves.