Should CDL practice track coverage separately from accuracy?

Most practice scores answer one question: how many attempts were correct. They do not show how much of the question bank was seen. A learner can score 17 out of 20—85%—while repeating the same 20 questions; against 158 General Knowledge questions, unique coverage would be about 13%. That should trigger more study, not a pass prediction.

I built CDL Quest around separate signals for accuracy, unique-question coverage, and recent practice evidence, plus missed-answer repair. I would especially value feedback from CDL learners and instructors: what is more useful when choosing what to study next—topic-level coverage, a missed-question queue, or a plain list of unseen concepts?

CDL Quest is an independent study aid, not an official exam source or pass guarantee.