SOA-C03Domain 1: Monitoring, Logging, Analysis, Remediation, and Performance OptimizationMonitoring & RemediationmediumSingle choice
Traffic varies 10× between day and night, so static alarm thresholds page on normal patterns. Which CloudWatch feature learns the metric's natural band?
A.Higher static thresholds
Still one threshold for all times of day.
B.Anomaly detection alarms — a learned band from historical data
Correct. Learned band adapts to cyclical traffic.
C.Composite alarms
Composite alarms combine alarms — don't learn bands.
D.Longer evaluation periods
Delays alerts, doesn't fix wrong thresholds.
Why this answer
Anomaly detection models the metric's own history (daily/weekly cycles) into a dynamic band — alarms fire only when behavior deviates from normal, not at fixed levels. Static thresholds can't express 'normal at 3am' vs 'normal at 3pm'.
Correct answer: B · Last reviewed 2026-11-04
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