What are administrators actually purchasing when they order an online exam?
In the absence of actual test booklets, institutions are instead purchasing the access rights to the exam. The purchasing institution receives permission to use the exam a certain number of times. The access rights to the exam are referred to as authorization codes. The authorization code is a random password that permits one student access to the exam and cannot be reused. So an institution that needs to administer 40 exams must order 40 authorization codes.