Does sharing a file expose the folder it's in?

When I share a file (to anyone with the link, no editing allowed), is there a way for whoever has that link to also see other files in the same folder:

1. files that are shared with others but not with them (also to anyone with the link, no editing allowed)?
2. files that I have not shared with anyone?

I am pretty sure the answers are "no, and an even stronger no" , but I want to make 100% sure, as I have both shared files and files that absolutely have to remain private in the same folders.

Thank you!