A user has setup an EBS backed instance and a CloudWatch alarm when the CPU utilization is more than 65%. The
user has setup the alarm to watch it for 5 periods of 5 minutes each. The CPU utilization is 60% between 9 AM to 6 PM.
The user has stopped the EC2 instance for 15 minutes between 11 AM to 11:15 AM. What will be the status of the alarm
at 11:30 AM?

A.
Alarm

B.
OK

C.
Insufficient Data

D.
Error

Explanation:
“if some data points during the current window are missing, CloudWatch looks back extra periods to find other existing
data points to use to assess whether the alarm should change state. CloudWatch does this to avoid going to
INSUFFICIENT_DATA when possible. When CloudWatch does this, if the furthest back period that is now being
considered is not breaching, the alarm state will not go to ALARM.”
http://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/AlarmThatSendsEmail.html