What is server immutability?
instance usage is considered temporary or ephemeral in nature for the period of deployment until the current release is active. During the new release, a new set of EC2 instances are rolled out by terminating older instances. This type of upgrade technique is more common in an immutable infrastructure. https://d0.awsstatic.com/whitepapers/overview-of-deployment-options-on-aws.pdf
A.
Not updating a server after creation.
B.
The ability to change server counts.
C.
Updating a server after creation.
D.
The inability to change server counts.
Explanation:
Explanation/Reference:
… disposable upgrades offer a simpler way to know if your application has unknown dependencies. The underlying EC2