Exam AWS-SysOps topic 1 question 399 discussion

Exam question from Amazon's AWS-SysOps

Question #: 399
Topic #: 1

When rebalancing, Auto Scaling launches new instances before terminating the old ones, so that re-balancing does not compromise the performance or availability of your application. Because Auto Scaling attempts to launch new instances before terminating the old ones, being at or near the speci-fied maximum capacity could impede or completely halt rebalancing activities. What does Auto Scaling do in order to avoid this problem?

A. It can temporarily exceed the specified maximum capacity of a group by a 20 percent margin (or by a 2-instance margin, whichever is greater) during a rebalancing activity.
B. It can add new reserved instances you have defined.
C. It can temporarily exceed the specified maximum capacity of a group by a 10 percent margin (or by a 1-instance margin, whichever is greater) during a rebalancing activity.
D. It can temporarily exceed the specified maximum capacity of a group by a 5 percent margin (or by a 1-instance margin, whichever is greater) during a rebalancing activity.

Show Suggested Answer

Suggested Answer: C 🗳️
When rebalancing, Auto Scaling launches new instances before terminating the old ones, so that re-balancing does not compromise the performance or availability of your application. Because Auto Scaling attempts to launch new instances before terminating the old ones, being at or near the speci-fied maximum capacity could impede or completely halt rebalancing activities. To avoid this prob-lem, the system can temporarily exceed the specified maximum capacity of a group by a 10 percent margin (or by a 1-instance margin, whichever is greater) during a rebalancing activity.
Reference:
http://docs.aws.amazon.com/autoscaling/latest/userguide/auto-scaling-benefits.html

by mgurkan at Jan. 13, 2022, 1:02 a.m.

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albert_kuo

10 months, 1 week ago

Selected Answer: C

Because Amazon EC2 Auto Scaling attempts to launch new instances before terminating the earlier ones, being at or near the specified maximum capacity could impede or completely halt rebalancing activities. To avoid this problem, the system can temporarily exceed the specified maximum capacity of a group during a rebalancing activity. It can do so by a margin of 10 percent or one instance, whichever is greater. The margin is extended only if the group is at or near maximum capacity and needs rebalancing. This can happen because of user-requested rezoning, or to compensate for zone availability issues. The extension lasts only as long as needed to rebalance the group (typically a few minutes). Capacity Rebalancing

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mgurkan

2 years, 3 months ago

I vote for C because Amazon EC2 Auto Scaling attempts to launch new instances before terminating the old ones, being at or near the specified maximum capacity could impede or completely halt rebalancing activities. To avoid this problem, the system can temporarily exceed the specified maximum capacity of a group by a 10 percent margin (or by a 1-instance margin, whichever is greater) during a rebalancing activity.

upvoted 1 times

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Exam AWS-SysOps topic 1 question 399 discussion

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albert_kuo

mgurkan

SY0-701