Emacs Questions

Various questions I have about Emacs

Why do some functions have double dashes?

As an example of what I mean, org-roam had seemingly the same function names at one point, despite the only difference being some double dashes

Here is an example of what I mean

At first glance, the naming differences between org-roam-capture--get-point and org-roam--capture-get-point seems completely arbitrary

Supposedly, since there is no such thing as internal vs external functions, it's a convention for declaring that a function should be considered private or internal only

https://emacs.stackexchange.com/questions/42286/double-hyphen-in-elisp-function-names

I still don't understand the above example since they both have double hyphens

Why do some lists start with a backtick (`) instead of a comma (')

One basically does list interpolation

How can I find out what places Emacs is checking for my passwords?

auth-sources
(password-store "~/.authinfo.gpg")