As a Solutions Architect, you are dealing with an architecture that supports Amazon EC2 Auto Scaling to handle an application load. When considering current policies in the design, you have noticed a variety of choices in place. Which statement is NOT true in these cases?

Answer options:

A.In most cases, step scaling policies are a better choice than simple scaling policies, even if you have only a single scaling adjustment.
B.You cannot have multiple target tracking scaling policies for an Auto Scaling group, but you can have multiple scaling policies in force simultaneously.
C.CloudWatch alarms associated with your target tracking scaling policies are deleted automatically when you delete the scaling policies.
D.The gaps between the target value and the actual metric data points prevents you from adding an insufficient number of instances or removing too many instances.

Answer: B
You can have multiple target tracking scaling policies for an Auto Scaling group, provided that each of them uses a different metric. You can also have multiple scaling policies in force at the same time.
Option A is incorrect because the statement is true. Amazon recommends step scaling policies as a better choice than simple scaling policies.
Option C is incorrect because the statement is true. Amazon suggests not to edit or delete the CloudWatch alarms that are configured for the target tracking scaling policy.
Option D is incorrect because the statement is true. Amazon acts conservatively by rounding up or down when determining how many instances to add or remove.
References:
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