Why This Cheat Sheet Matters for DOP-C02
This cheat sheet covers the most important Monitoring & Observability concepts tested on the DOP-C02 (AWS DevOps Engineer Professional) certification exam. It contains 4 sections with 16 key points that you should memorize before exam day. Practice CloudWatch metrics, logs, alarms, dashboards, Logs Insights, anomaly detection, composite alarms, and cross-account observability. Use this as a quick-reference guide during your final review sessions.
4Sections
16Key Points
CloudWatch Metrics & Alarms
- Standard resolution: 1 min (basic) or 5 min; high-resolution: 1 sec
- Composite alarms: combine multiple alarms with AND/OR logic
- Anomaly detection: ML-based bands for metric baselines
- Metric math: expressions across metrics (METRICS, FILL, SEARCH)
CloudWatch Logs
- Log groups → log streams → log events
- Subscription filters: real-time to Lambda, Kinesis, or OpenSearch
- Logs Insights: query language for analysis (fields, filter, stats, sort)
- Cross-account log sharing via destination policies
X-Ray Tracing
- Traces → segments → subsegments
- Annotations: indexed key-value for filtering
- Metadata: non-indexed debug data
- Sampling: reservoir (per-second) + fixed rate
EventBridge
- Event bus: default, custom, partner, cross-account
- Rules: event patterns (content-based filtering) or schedule
- Targets: Lambda, SQS, SNS, Step Functions, SSM Automation, and 20+ more
- Archive and replay for debugging and recovery
Practice Monitoring Questions
Put your knowledge to the test with practice questions.