[Assess students' ability to design and implement a scalable distributed cache using consistent hashing and replication. The quiz will test applied knowledge of consistent-hashing ring design and virtual nodes, replication strategies and replication factor, quorum reads/writes, failure detection and rebalancing, cache invalidation and consistency trade-offs, and performance considerations like hotspot mitigation and latency. Include scenario-based problems requiring calculations for key placement and vnode distribution, analysis of failover behavior, and justification of design choices and simple pseudo-code or configuration decisions.]