Mcat preparation

I’m about to start studying for my MCAT and I want to know how can I take a diagnostic exam? Is it just one practice test ? Or is it a specific one I have to purchase ? Is it an 8 hour exam ? Also once I start content review how can I test my knowledge for every subject? because the question after every chapter don’t seen to be a lot.
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Tags: Pre-Medical - MD Source Type: forums