You are managing an application that acts as the front end and you use MongoDB for document management which is hosted on a relevant Web server. You pre-bake AMI`s with the latest version of the Web server, then used the User Data section to setup the application. You now have a change to the underlying Operating system version and need to deploy that accordingly. How can this be done in the easiest way possible ?

Answer options:

A.Create a new EBS Volume with the relevant OS patches and attach it to the EC2 Instance.
B.Create a Cloudformation stack with the new AMI and then deploy the application accordingly.
C.Create a new pre-baked AMI with the new OS and use the User Data section to deploy the application.
D.Create an Opswork stack with the new AMI and then deploy the application accordingly.

Answer – C
The best way in this scenario is to continue the same deployment process which was being used and create a new AMI and then use the User Data section to deploy the application.
For more information on AWS AMI’s please see the below link:
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/AMIs.html