Monitoring, Logging, and Observability on AWS Flashcards
6 cards from real DevOps Engineering on AWS Certification practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
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Which AWS service aggregates and visualizes logs from EC2, Lambda, ECS, and other AWS resources?
Answer: Amazon CloudWatch Logs
Amazon CloudWatch Logs is the central service for collecting, monitoring, and storing log data from virtually any AWS resource or application.
What does AWS X-Ray provide for distributed applications?
Answer: End-to-end tracing to identify performance bottlenecks and errors across services
AWS X-Ray records traces of requests as they travel through distributed application components, helping identify latency and error sources.
Which CloudWatch feature automatically detects unusual patterns in metrics without requiring you to set static thresholds?
Answer: CloudWatch Anomaly Detection
CloudWatch Anomaly Detection uses machine learning to model the expected behavior of metrics and alerts when values deviate significantly.
Which CloudWatch feature allows you to interactively search and analyze log data using a query language?
Answer: CloudWatch Logs Insights
CloudWatch Logs Insights provides a powerful query syntax to search, filter, and aggregate log data in near real time.
What is the default metric retention period in Amazon CloudWatch for high-resolution metrics (1-second granularity)?
Answer: 3 hours
High-resolution CloudWatch metrics at 1-second granularity are retained for 3 hours, after which they are aggregated to longer periods.
Which AWS service records API calls made in your AWS account, providing a full audit trail?
Answer: AWS CloudTrail
AWS CloudTrail logs every API call made in your AWS account, including the caller identity, time, source IP, and request/response parameters.
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- docs.aws.amazon.com — Exam information · verified Oct 2026
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