How would you answer an interview scenario involving Amazon CloudWatch and AWS X-Ray in AWS?
For an interview scenario involving Amazon CloudWatch and AWS X-Ray, I would first clarify the business goal, scale, constraints, and the failure or quality attribute the interviewer wants to explore. Amazon CloudWatch provides metrics, logs, alarms, and dashboards, while AWS X-Ray supports distributed tracing. In this scenario, for intermittent latency across ALB, ECS, RDS, and an external API, explain how you would combine CloudWatch metrics, logs, and X-Ray traces to isolate the cause. For production, define meaningful metrics and SLIs, use structured logs, distributed traces, correlation IDs, actionable alarms, dashboards, retention policies, and centralized log analysis. I would then explain the main alternatives and tradeoffs, identify likely failure modes, and describe how I would validate the solution through testing, observability, security controls, and recovery or rollback planning.