AWS Certified CloudOps Engineer Associate SOA-C03 Practice Question
An operations team monitors an application running on Amazon EC2. A CPUUtilization metric alarm and a DiskReadOps metric alarm are configured. The team wants a single CloudWatch alarm that notifies an Amazon SNS topic only when both existing metric alarms are in the ALARM state at the same time. The solution must prevent duplicate notifications and must not add extra metric evaluation cost. Which approach meets these requirements?
Configure an Amazon EventBridge rule that triggers an SNS topic when it receives ALARM state change events from both metric alarms.
Enable anomaly detection on each metric alarm and set both to notify the same SNS topic when anomalies are detected.
Create a CloudWatch metric math alarm that adds the two metrics together and triggers when the sum exceeds a threshold.
Create a CloudWatch composite alarm that uses an AND expression for the two existing metric alarms and disable alarm actions on the individual alarms.
A CloudWatch composite alarm allows you to build a rule expression (using AND/OR operators) that evaluates the state of other CloudWatch alarms without creating new metrics, so there is no additional metric ingestion or evaluation charge. By disabling actions on the underlying metric alarms, you ensure that notifications come only from the composite alarm, preventing duplicates. EventBridge rules, metric math alarms, or anomaly detection alarms either introduce separate evaluations, do not combine existing alarm states, or do not eliminate duplicate notifications.
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What is a CloudWatch Composite Alarm?
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Why should individual alarm actions be disabled when using a composite alarm?
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How does a composite alarm differ from metric math alarms?
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What is a CloudWatch composite alarm?
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What is the difference between a CloudWatch metric alarm and a composite alarm?
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How do you prevent duplicate notifications in CloudWatch alarms?
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AWS Certified CloudOps Engineer Associate SOA-C03
Monitoring, Logging, Analysis, Remediation, and Performance Optimization
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