I know all about tests and test taking. You can bet on that. I got my undergrad degree and then had two years of classes, past that. As a teacher, I had to compose tests every damn week. Oh, and I challenged many a professor on for-crap exam questions, as a student, and prevailed more often than not.
ISA's tests are of very poor quality, to a great extent. I could give you examples of complete questions and their corresponding distractors and answers, but I have a feeling that I might hear from ISA's legal department after doing so.
As far as ISA having to throw out a question if they gave you the answer after you missed it---what BULL(censored)! Tests should be learning experiences. Once you find out what you didn't know, you know it. With a data base of a few thousand questions, distractors and answers, there would be no reason for the scrapping of answered questions. ISA does not give you the answers because it wants to scrimp on production costs of given exams and it doesn't want the folks who compose the questions to be challenged when those same folks put together questions that make no sense and/or have the incorrect answer db'd as the correct one.
When the issue is raised that if a test's answers are revealed then that test is no longer valid, I say the same thing as I said, above. Unless you are giving an mc test with all of the questions and answers in the same exact order so as to be memorized without any learning, whatsoever, who gives a rat's (censored)? I only wish my poorer students had taken the time to memorize the answers I gave them on my exams, after they failed. I could, and did, give them the factual answers, give them a retake exam with a different question order and guess what-----??? They failed again! If you can memorize the factual answers to questions, I say that is a good thing and you have learned something. Perhaps the learning is of a different quality than that accomplished by studying superfluous facts in a sprawling presentation, but it is learning, nonetheless.
To this day, I still wonder about eleven questions I missed on the CA exam. I only hope I don't harm a tree doing the wrong thing because ISA was wanting to save a few bucks.