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AWS Certified Solutions Architect - Associate · AWS
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you cannot get cheaper than one, and D says to reduce the maximum and does not mention the minimum.
analysis/explanation by copilot > A: you reduce the target group instance, doesnt mean the other one is shut down / terminated (sound tricky but could be true, it didnt mention the other machine is terminated) > D: that make sure only 1 machine is always up in that case then D would make more sense (disregard the high availability concern, A is still more costly then)
A. This is the most cost-effective approach for a development environment. Since development environments typically don't need the same level of high availability or performance as production, reducing the number of target EC2 instances to one minimizes costs. D. Reducing the maximum size of the Auto Scaling group can limit scaling, but it doesn't guarantee cost savings if those instances are running. Reconfiguring the target group to use only one instance is a more direct way to reduce costs in the development environment.