Exam AWS Certified Solutions Architect - Professional SAP-C02 topic 1 question 347 discussion

Should be B https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/placement-groups.html If you try to add more instances to the placement group later, or if you try to launch more than one instance type in the placement group, you increase your chances of getting an insufficient capacity error. If you stop an instance in a placement group and then start it again, it still runs in the placement group. However, the start fails if there isn't enough capacity for the instance. If you receive a capacity error when launching an instance in a placement group that already has running instances, stop and start all of the instances in the placement group, and try the launch again. Starting the instances may migrate them to hardware that has capacity for all of the requested instances.

B is correct, when you try to add more instances to a placement group with insufficient capacity, it might result in an "Insufficient capacity" error. One way to troubleshoot this issue is by recycling (stopping and starting) all existing instances in the placement group. This helps AWS reschedule your instances to accommodate the new ones. Other options do not solve the root cause of the problem.

Option B - https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/troubleshooting-launch.html#troubleshooting-launch-capacity OR https://repost.aws/knowledge-center/ec2-insufficient-capacity-errors

Option B

B https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/placement-groups.html#concepts-placement-groups:~:text=stop%20and%20start%20all%20of%20the%20instances%20in%20the%20placement%20group%2C%20and%20try%20the%20launch%20again

Answer is B https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/placement-groups.html#concepts-placement-groups

I agree with answer B despite the fact that you will have to incur downtime and (obviously) will discuss that before executing the stop and start. This question does not particular state that there must be no downtime. So my advice would be taking appropriate actions and stop/start placement group instead of add Dedicated Host.

https://www.examtopics.com/discussions/amazon/view/89258-exam-aws-certified-solutions-architect-professional-topic-1/

George88's article specifically states B as the answer. However, I agree with Heatblur's reply that in a prod load in real life this is unacceptable unless your app is resilent and can afford a handful of servers being rebooted.

Using Dedicated Hosts (D) can be a solution if the capacity issue is persistent and critical, and if the cost and complexity of managing Dedicated Hosts are justifiable. A: Spread Placement might help but doesn't directly address the capacity issue. B: All the instances are handling traffic -- stopping them surely won't help. C: You can't merge placement groups.

Vote B

A forsure

Answer: B