In my opinion, the brain dump would take too much time out of the valuable time you're given to take the exam.
Memorizing the process names is a good idea because knowing them provides a good reference point to help answer questions such as "what should you do first" or "what should you do next" (because some of the processes have a logical order).
It's also a good idea to remember a few key points for each process, especially for less than obvious ones. This can be done by breaking down the short definition paragraph from the PMBOK Guide into a few key points.
One thing that helps to memorize the names of the 49 processes is to:
1. Organize the processes by knowledge area and process group (as shown in the PMBOK Guide) in an excel worksheet.
2. Start by memorizing by Process Group or from the top down - i.e start with Initiating; 4.1 Project Charter and then 13.1 Identify Stakeholders, and then go to Planning; 4.2 Project Management Plan, 5.1 Plan Scope Management, etc. This makes memorizing them easier than going horizontally.
3. Memorize in chunks of 3-4 processes or by knowledge area.
Also playing Rita's process chart game can help