Yes and No. Yes if you get downed and dont get revived and no if you get downed and get revived.
Yes.
When you die in Zombies, you do not keep your perks.
Perks are Things that Help You on Your Game
8
at the bottom of create a class
15+pro perks if I'm not mistaken
4
i real kow what it isidk
In Call of Duty: Black Ops 2 Zombies, there isn't a strict limit on the number of times you can purchase perks, but there are specific mechanics that affect their availability. Players can buy perks multiple times, but after the first purchase, the cost increases, and once the player has reached the perk limit (four perks total), they cannot buy additional perks until they down or lose them. Additionally, some maps have specific perks that can only be acquired in designated areas or under certain conditions.
Some of the Perks can be found under the related links although you do have to scroll down to the section
yah
If your talking about online then in create a class go to perks and get ghost and ninja perks(perks 1 and 3) to have them be better perks or be more 'sneaky' u can do the work it has to do then you can upgrade them to pro!