Yes, that is quite possible. However, there is then the possibility of repeating it within an appropriate framework:
If a participant has passed the practical part but not the theoretical part, he or she can attend the theoretical part of the training again at another training date and then sit for the theoretical examination again. In this case, the practical part as well as the practical examination do not have to be taken again.
If a participant has not passed both parts, he/she must repeat the training. The training provider reserves the right to impose separate requirements on repeaters for the preparation prior to admission to repeated attendance of a training course.
There is no specific time limit with regard to a repeat attempt, but a repeat attempt is not permitted on the same day as the failure. Each part of the examination may be repeated a maximum of two times in case of failure. Exceptions are possible on application.
If the candidate fails a part of the examination, he/she may discuss the results with the examination expert.