Many students operate under the illusion that re-reading notes is an effective study method. Cognitive science suggests otherwise. This phenomenon is known as the "illusion of competence." You recognize the material as you read it, tricking your brain into thinking you know it, but you haven't actually practiced retrieving the information.
Taking a practice test at midnight after a 12-hour shift gives you a false low score. Take it when you are fresh (morning hours) to accurately gauge readiness. rpnce practice test