Suggested Answer:A🗳️
When you use Auto Scaling, your applications gain better fault tolerance. Auto Scaling can detect when an instance is unhealthy, terminate it, and launch an instance to replace it. You can also configure Auto Scaling to use multiple Availability Zones. If one Availability Zone becomes unavailable, Auto Scaling can launch instances in another one to compensate. Reference: http://docs.aws.amazon.com/AutoScaling/latest/DeveloperGuide/how-as-works.html
Answer: A
Explanation:
When you use Auto Scaling, your applications gain better fault tolerance. Auto Scaling can detect when an instance is unhealthy, terminate it, and launch an instance to replace it. You can also configure Auto Scaling to use multiple Availability Zones. If one Availability Zone becomes unavailable, Auto Scaling can launch instances in another one to compensate. http://docs.aws.amazon.com/AutoScaling/latest/DeveloperGuide/how-as-works.html
First think about the difference of HA and FT.
https://www.ibm.com/docs/en/powerha-aix/7.2?topic=aix-high-availability-versus-fault-tolerance
FT: no service interruption
HA: minimal service interruption
FT is a upgrade version of HA
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