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
Explanation:
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.http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/concepts-on-demand-reservedinstances.html
https://forums.aws.amazon.com/thread.jspa?threadID=56501
Convertible RIs: These provide a discount (up to 54% off On-Demand) and the capability to change the attributes of the RI as long as the exchange results in the creation of Reserved Instances of equal or greater value. Like Standard RIs, Convertible RIs are best suited for steady-state usage.
A. can be modified so True
B. specific to platform, False
C. Whenever to buy any RI, If using AutoScaling you are using the same Instance type which you have reserved, the cost savings would be applied automatically, True
D. specific to instance family but instance type can be changed, False
E. helps to reduce cost, True