The current exams appear to be based on ClearPass 6.5, so you will get questions and need to answer following that version. That will be the 'unique endpoints' method for licensing instead of the 6.7 concurrent users.
Exams do have versions as well, and there might become a new version available at any point in time. Please check the exam information at: https://certification-learning.hpe.com/TR/certifications, then click through to the exam that you will take to see what version is tested.