Yes! However, in order to re-take a DEDP Proctored Exam, you will need to enroll in a future session of the course and submit payment again, in order to upgrade to the Verified (Paid) enrollment track.
However, if you have already earned a sufficient Cumulative Score—for the coursework, including assignments, finger exercises, and the Comprehensive Review—then you are not required to re-complete that Base Course Content. You are welcome and encouraged to re-complete the coursework, however, either in order to improve your Cumulative Score (in order to achieve a higher Overall Course Score) or simply in order to review the course content!
If you decide to retake a course's Proctored Exam and/or re-complete its Base Course Content, only the highest score you achieve for each will be saved on your program record, even if it is not the most recent.