Maybe. The "Practice Exams" courses are designed to test your knowledge to ensure you are ready to pass your certification exam. If you are already working in the field covered by your certification, the "Practice Exams" courses can help you determine which areas you need to study specifically instead of having to study an entire textbook. Alternatively, if you already watched a video series from another instructor or read a textbook, the "Practice Exams" courses by themselves can be used to ensure you are ready to pass the exam.