Meta Site Reliability Engineer Interview Questions

I would first decide whether rollback, hotfix, or traffic reduction is the fastest way to protect users. Then I would communicate clearly with stakeholders, stabilize the system, and document the timeline for the post-incident review. The reason I choose this approach is that production problems need fast containment before root-cause analysis. I would also think about whether the deployment path itself needs better guardrails. If the interviewer wants more detail, I would explain how I would balance speed with safety.

I would first compare the region against healthy regions and check whether the issue is in the pipeline, the storage layer, or a downstream dependency. Then I would inspect recent deploys, traffic shape, throttling, and any regional capacity constraints. The reason I choose this approach is that regional ingestion issues often come from a localized bottleneck rather than a global defect. I would also think about whether the latency spike is causing customer-visible impact or just internal backlog. If the interviewer wants more detail, I would describe how I would define go or no-go criteria for declaring the incident resolved.

I would design a simple API with clear reliability guarantees, retries with backoff, and sensible defaults that make correct usage easy. Then I would add validation, batching, and failure handling so the utility does not create extra risk for the systems using it. The reason I choose this approach is that internal tooling should reduce toil without becoming a new source of outages. I would also think about idempotency, observability, and documentation so engineers can trust the tool. If the interviewer wants more detail, I would explain how I would test the library under failure conditions.

I would focus on what happened, who was affected, what we did to fix it, and what we are changing to prevent it. I would avoid jargon and translate the technical root cause into business impact and recovery steps. The reason I choose this approach is that stakeholders need clarity and trust more than implementation details. I would also think about giving a realistic timeline and being clear about uncertainty where it still exists. If the interviewer wants more detail, I would explain how I would follow up after the incident.

I would identify which dependencies are essential and add timeouts, retries with backoff, fallback behavior, and circuit breakers around them. Then I would decide what the service can safely do in degraded mode if a dependency is unavailable. The reason I choose this approach is that resilience comes from planning for partial failure, not from assuming every dependency will always be healthy. I would also think about caching, queueing, and load shedding if the system needs to keep operating under stress. If the interviewer wants more detail, I would connect the strategy to a real incident pattern.