A company has stopped all of its Amazon EC2 instances but monthly billing charges continue to occur.
What could be causing this?
(Choose two.)
Amazon Elastic Block Store (Amazon EBS) storage charges
Operating system charges
Hardware charges
Elastic IP charges
Input/output (I/O) charges
Explanations:
Even if EC2 instances are stopped, charges for EBS volumes (storage) are incurred since they remain allocated.
There are no operating system charges; customers pay only for the EC2 instances and associated resources.
There are no hardware charges directly; users pay for the instances and associated services, not for the hardware itself.
If an Elastic IP is allocated to a stopped instance, charges apply for the Elastic IP even if the instance is not running.
I/O charges apply only when data is processed or transferred; stopped instances do not incur these charges.
I calculate that the answer is:
Amazon Elastic Block Store (Amazon EBS) storage charges