It would be nice to have the option of using the advantages of computerized testing instead of just replicating an old paper exam. Allow examinees to mark individual answers as their "final answer" or to "skip and review later". That way the examinee doesn't need to waste time reviewing and second guessing the questions they were confident in the first time. This would also allow the exam to potentially end early once they had enough "final" answers to guarantee a pass or a fail.
Optionally, show the examinee what the right answer was instantly once they committed to one.