I've just reviewed the documentation for mod_quiz and classes/external.php and unless I am missing something, there doesn't appear to be a way to fetch the full list of user quiz results in a similar way to the screen in moodle that lets you see a table of student names and their answer for each quiz result. Is that correct?
I am being asked to suck out data about student's quiz results. It appears the only way to do this at the moment would be to iterate over each user id and pull out quiz information for that user. (Which I am not keen on doing as it would likely impact the server performance while we are sucking out the data)
Is such an API a feasible addition that we might be able to hope to appear in a future release?