AWS Certified SysOps Administrator – Associate (legacy) — Question 184

Which of the following requires a custom CloudWatch metric to monitor?

Answer options

• A. Data transfer of an EC2 instance
• B. Disk usage activity of an EC2 instance
• C. Memory Utilization of an EC2 instance
• D. CPU Utilization of an EC2 instance

Correct answer: C

Explanation

Memory Utilization of an EC2 instance requires a custom CloudWatch metric because AWS does not provide this monitoring out of the box for EC2 instances. In contrast, Data transfer, Disk usage, and CPU Utilization are automatically monitored by CloudWatch and do not need custom metrics.