How to see if there is a hidden admin role with an account that has no admin access?
... For a person who is just now learning Drupal, what would be the easiest way to see if their is a hidden admin role?


Talk to your friend, and perform these steps:


Step 1: ask for a screenprint (created by your friend, while your friend is logged in) of the list of roles shown via relative path admin/people/permissions/roles ... That will show you all "roles" defined in your site. Typically you'll have at least these 3 hardcoded (= delivered with Drupal) roles:


anonymous user (in the Drupal database this corresponds to role id = 1).
authenticated  user (in the Drupal database this corresponds to role id = 2).
administrator (in the Drupal database this corresponds to role id = 3).

Step 2: find out what the "user id" is for the user that you received, which you'll typically see (as part of the relative path) when you try to edit your own profile.
Step 3: ask for a screenprint (created by your friend, while your friend is logged in) of the granted roles shown via relative path user/uid/edit (whereas uid in it corresponds to your own user id) ... That will show you all "roles" you have been granted. Probably the role "administrator" will not have been granted.