Crucial Exams

AWS Certified CloudOps Engineer Associate SOA-C03 Practice Question

A CloudOps engineer is deploying an application with an Auto Scaling group through AWS CloudFormation. The deployment targets two existing private subnets, each using a /28 CIDR block inside a /16 VPC. During stack creation, several EC2 instance launches fail with the message "Subnet has no available IP addresses" and the stack ultimately rolls back. What is the most appropriate way to remediate this subnet-sizing issue while following AWS best practices?

  • Change the VPC CIDR block from /16 to /15 so the existing /28 subnets automatically receive more IP addresses without code changes.

  • Create two new /24 private subnets in the same Availability Zones, update the CloudFormation stack to use the new subnet IDs, and delete the /28 subnets after migration.

  • Lower the Auto Scaling group desired capacity and maximum size to stay within the current subnets' available IP addresses.

  • Disable auto-assignment of public IPv4 addresses on the current subnets to free additional private IP space for EC2 instances.

AWS Certified CloudOps Engineer Associate SOA-C03
Deployment, Provisioning, and Automation
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