Multi Region and Multi Cloud Resilience Questions
Designing systems that work across multiple geographic regions or cloud providers. This addresses the highest reliability requirements and provides protection against provider-level failures. At senior level, understand data replication across regions, latency implications, consistency trade-offs, and cost of multi-region deployments. Design routing policies that direct traffic to healthy regions. Address compliance requirements that may mandate geographic distribution.
EasyTechnical
0 practiced
Explain the differences between deploying services across multiple geographic regions versus multiple availability zones (AZs) within the same cloud region. In your answer, discuss failure domains and typical failure modes, impact on RTO and RPO, latency and user-experience trade-offs, cost and operational overhead, and when an SRE would choose multi-AZ vs multi-region for stateless and stateful workloads.
MediumTechnical
0 practiced
Draft a disaster recovery (DR) runbook for a full-region outage. The runbook should include detection criteria, decision gates to start failover, communication templates for internal and customer-facing messages, steps to shift traffic, promote stateful systems, and post-failover validation checks.
EasyTechnical
0 practiced
Explain options for replicating object and block storage across regions. Compare cloud-managed cross-region replication (e.g., S3 CRR) to application-level replication and to block-device replication. Discuss consistency guarantees, egress cost implications, and common operational pitfalls.
MediumTechnical
0 practiced
Your Postgres primary sits in us-east and read replicas in eu-west and ap-southeast. Describe the step-by-step approach for failover when the primary is unavailable: how to detect safe promotion, handle replication lag, reconfigure application connection strings, and validate integrity after promotion.
MediumSystem Design
0 practiced
Design an active-active read architecture for a globally distributed web service where reads must be low-latency and writes must be globally durable. Sketch components (edge, regional caches, regional read replicas, global write path), and explain consistency trade-offs and how you would minimize user-visible anomalies.
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