You are working as an AWS administrator of your company. As part of code deployment, you have provisioned EC2 instances with EBS volumes being encrypted using customer-managed CMK. The automatic key rotation is enabled. When will the KMS key be rotated automatically?

Answer options:

A.After 30 days
B.After 128 days
C.After 365 days
D.After 3 years

Answer: C
Option A is incorrect because customer-managed CMK gets rotated automatically every 365 days (1 year) and not in 30 days.
Option B is incorrect because customer-managed CMK gets rotated automatically every 365 days (1 year) and not in 128 days.
Option C is CORRECT because customer-managed CMK gets rotated automatically every 365 days (1 year).
Option D is incorrect because customer-managed CMK gets rotated automatically every 365 days (1 year) and not in 3 years.
For more details, please refer to the following URLs:
https://docs.aws.amazon.com/kms/latest/developerguide/concepts.html
https://docs.aws.amazon.com/kms/latest/developerguide/rotate-keys.html