It depends. In zombie mode the best perks are Juggernaut, Quick Revive, and Sleight of Hand. In multiplayer mode the best are Marathon, Flak Jacket, Sleight of Hand, Warlord, and Second Chance.
A.k. 47 juggernaut
Perks are Things that Help You on Your Game
8
at the bottom of create a class
Yes.
15+pro perks if I'm not mistaken
4
i real kow what it isidk
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!
When you die in Zombies, you do not keep your perks.