And this is what I see at the top of two of my next submissions:
Due Monday by 11pm / Points 30 / Submitting: a file upload / File Types: pdf, doc, and docx / Available until Oct 20 at 12pm
Due No due date / Points 1 / Questions 1 / Time Limit None
Neither says how many attempts I have. I believe the file upload has unlimited re-uploads and the latter only allows for one submission, but I really have no idea how to confirm that without risking it.