Which of the following are characteristics of a reserved instance? Choose 3 answers
A.
It can be migrated across Availability Zones
B.
It is specific to an Amazon Machine Image (AMI)
C.
It can be applied to instances launched by Auto Scaling
D.
It is specific to an instance Type
E.
It can be used to lower Total Cost of Ownership (TCO) of a system
A, C, E
http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/concepts-on-demand-reserved-instances.html
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These regional Reserved Instances provide Availability Zone and instance size flexibility. Availability Zone flexibility provides the Reserved Instance discount to instance usage in any Availability Zone in a region.
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You can use Auto Scaling or other AWS services to launch the On-Demand Instances that use your Reserved Instance benefits. For information about launching On-Demand Instances, see Launch Your Instance. For information about launching instances using Auto Scaling, see the Auto Scaling User Guide.
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Reserved Instances provide you with a significant discount compared to On-Demand Instance pricing.
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