Crucial Exams

AWS Certified CloudOps Engineer Associate SOA-C03 Practice Question

A DevOps engineer installed the unified CloudWatch agent on dozens of Amazon EC2 instances in two Regions. The agent publishes the mem_used_percent metric in the CWAgent namespace with the InstanceId dimension. The engineer must receive a single SNS notification whenever any instance's memory usage is above 80% for three consecutive 1-minute periods while minimizing management effort and CloudWatch costs. Which approach satisfies these requirements?

  • Create a CloudWatch alarm on the Metrics Insights query SELECT MAX(mem_used_percent) FROM "CWAgent" with a 60-second period, threshold 80, and three evaluation periods, and configure the alarm to publish to Amazon SNS.

  • Stream the mem_used_percent metrics to CloudWatch Logs, configure a metric filter that counts occurrences above 80% in a 1-minute window, and create a CloudWatch alarm on that filter to send an SNS notification.

  • Create a standard CloudWatch alarm for each EC2 instance that monitors mem_used_percent, then create a composite alarm that aggregates these alarms and publishes a notification to SNS.

  • Create an EventBridge rule that matches every PutMetricData API call from the CWAgent namespace, route the events to an SNS topic, and use SNS message filtering to detect values above 80%.

AWS Certified CloudOps Engineer Associate SOA-C03
Monitoring, Logging, Analysis, Remediation, and Performance Optimization
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