If I un-friend someone on Facebook, while they be notified?

Question

If I un-friend someone on Facebook, while they be notified?

Answer 1

No, he/she/they will not be notified that you canceled him/her/them as a facebook friend.  They only get notified when you add.  They also are not notified if you reject a friend request.  Only "positive" info is sent out in notifications.  

Answer 2

No, they won't, and all Facebook connections to them will be cut off (messaging, visibility settings, friend list, etc).

The only way for them to notice that they've been unfriended is to either notice you're not on their Friends list anymore, or unable to view your profile.

Answer 3

No, but i think that you will still be in their friends list....

Answer 4

No.  There's no notification and the only way they would find out would be to notice that their number of friends went down one and then make a correct guess as to who that person is that unfriended them.  However, it IS pretty easy to tell if someone unfriended a person if they have a lot of tagged photos together since when they go through pictures they will notice.