Is either the CSCS or NSCA-CPT Practice exam an old version of an actual exam?
No. A practice exam is not an old or previously-used exam, but rather an abbreviated test (only 1/3 as long as an actual exam) that can identify topic areas of competency or deficiency. Note that, because of its reduced length, not all of the concepts that are tested on the actual exam are included on the Practice exams. In other words, the Practice exams do not entirely describe the content of the actual exam and, for this reason, should not be the only resource used to study for an exam.