AWS Site Reliability Engineer Interview Questions

I would automate repetitive and error-prone tasks such as deployments, rollbacks, health checks, and recovery workflows. The reason I choose this approach is that automation reduces manual mistakes and makes response times more consistent. I would also think about safety checks, approval gates, and rollback logic so the automation does not create new risk. If the interviewer wants more detail, I would give examples of tasks that should stay manual versus those that should be automated. In SRE work, automation should remove toil without removing judgment.

I would check whether the issue is at the instance, subnet, security group, routing, or load balancer layer. Then I would verify system health, SSH access, disk space, CPU, and whether the instance is actually running. The reason I choose this approach is that reachability problems usually come from a small set of network or host issues. I would also think about whether the failure is isolated or part of a wider infrastructure problem. If the interviewer wants more detail, I would explain how I would use logs and cloud metrics to narrow it down.

I would describe the incident, the actions I took, and how I kept communication clear during the event. I would emphasize prioritization, calm decision-making, and any trade-offs I made to protect users first. The reason I choose this style is that Amazon SRE interviews often care about ownership and operational judgment. I would also mention what I learned afterward and what process or technical change came out of the incident. If the interviewer wants more detail, I would explain how the postmortem changed future behavior.

I would first determine whether the failure is in the template, permissions, dependencies, or capacity limits. Then I would compare the failing deployment to the last known good one and isolate the specific change that broke. The reason I choose this approach is that infrastructure failures are often introduced by one config or dependency change rather than the whole stack. I would also think about rollback, idempotency, and whether the deployment process itself needs better validation. If the interviewer wants more detail, I would describe the checks I would add before future deployments.

I would use timeouts, retries with backoff, circuit breakers, bulkheads, and load shedding so one failing service cannot drag down others. Then I would decide which dependencies can be degraded or cached when they are unhealthy. The reason I choose this approach is that distributed systems fail in chains when every service keeps depending on a broken one. I would also think about queue limits, fallback responses, and capacity isolation. If the interviewer wants more detail, I would connect the design to a real incident pattern.