Is it possible to have truly random questions per quiz attempt?

That's actually how it should work. Are you sure you are finishing the previous attempt? A new attempt should pull in new questions from the pool of questions tagged with those terms.

Thanks for the response. I’m not sure exactly why it was breaking but after some testing I was able to get the questions randomly being selected each time, as I was after, so it must have been as you suggested.

Part of my confusion was that I was unsure of the configuration when setting up the quiz. For example, (see attached "add-quiz" screenshot). I wasn’t sure if I should set “Number of random questions” to the total number of questions I wanted, although I see it did increase to the number I added once I saved the quiz. So is this option for the "Random order" and "Random question" options? I need to explain this to the users so I'm double checking.

To get what I wanted (12 questions, 3 categories) I selected “Categorised random questions”, created 3 Quiz terms and set “Number of questions” to 4. I'm assuming this is the correct procedure for what I want to do(?).

Thanks for your time

"Number of random questions" is ignored when you use categorized random questions. So your configuration is correct!

@d_t wonder if that answers your question and this can be closed out?

Since there hasn't been a follow up going to close out

if still an issue in 7.0.x please reopen