Production Incident Response and Diagnostics Questions

Covers structured practices, techniques, tooling, and decision making for detecting, triaging, mitigating, and learning from failures in live systems. Core skills include rapid incident triage, establishing normal baselines, gathering telemetry from logs, metrics, traces, and profilers, forming and testing hypotheses, reproducing or simulating failures, isolating root causes, and validating fixes. Candidates should know how to choose appropriate mitigations such as rolling back, applying patches, throttling traffic, or scaling resources and when to pursue each option. The topic also includes coordination and communication during incidents, including incident command, stakeholder updates, escalation, handoffs, and blameless postmortems. Emphasis is also placed on building institutional knowledge through runbooks, automated diagnostics, improved monitoring and alerting, capacity planning, and systemic fixes to prevent recurrence. Familiarity with common infrastructure failure modes and complex multi system interactions is expected, for example cascading failures, resource exhaustion, networking and deployment issues, and configuration drift. Tooling and methods include log analysis, distributed tracing, profiling and debugging tools, cross system correlation, and practices to reduce mean time to detection and mean time to resolution.