That is a question relative to other people's perceptions.
If you are getting above 80% on your PrepCast tests and are practising everyday, you should do very well on the exam.
Focus on your strengths and weaknesses, and deal with your own perceptions by asking yourself why you are asking this in the first place.
Training for Project Management Professional (PMP)®, PMI Agile Certified Practitioner (PMI-ACP)®, and Certified Associate in Project Management (CAPM)®
