Is there a limit to the number of groups you can have?
A.
Yes for all users except root
B.
No
C.
Yes unless special permission granted
D.
Yes for all users
Explanation:
Currently you can request to increase the limit on users per AWS account, groups per AWS
account, roles per AWS account, instance profiles per AWS account, and server certificates
per AWS account.
http://docs.aws.amazon.com/IAM/latest/UserGuide/reference_iam-limits.html