AWS Certified Solutions Architect – Professional (SAP-C02) — Question 335

A solutions architect has launched multiple Amazon EC2 instances in a placement group within a single Availability Zone. Because of additional load on the system, the solutions architect attempts to add new instances to the placement group. However, the solutions architect receives an insufficient capacity error.

What should the solutions architect do to troubleshoot this issue?

Answer options

• A. Use a spread placement group. Set a minimum of eight instances for each Availability Zone.
• B. Stop and start all the instances in the placement group. Try the launch again.
• C. Create a new placement group. Merge the new placement group with the original placement group.
• D. Launch the additional instances as Dedicated Hosts in the placement groups.

Correct answer: B

Explanation

An insufficient capacity error occurs when the specific hardware segment hosting the cluster placement group does not have enough physical resources to accommodate the new instances. Stopping and restarting all instances in the placement group allows AWS to redeploy the entire group onto a different hardware segment with sufficient capacity for both the existing and new instances. Other options, such as merging placement groups or switching to Dedicated Hosts, do not address this physical capacity limitation.