Does CTRL + A in a folder select the hidden items as well? Will copying a folder containing hidden files also copy the hidden files?
These questions pertain to:
Nautilus - Ubuntu
CTRL + A will not select hidden files if they are not displayed and therefore they will not be copied.
If you copy a whole folder "form the outside" which contains hidden files, the hidden files will also be copied.
No, unless the hidden files attribute is open:
Here's how to display hidden files and folders.