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Distributed Database Architecture Questions

Covers principles and patterns for designing databases that span nodes and regions. Subjects include replication strategies synchronous and asynchronous, partitioning and sharding approaches, leader follower and multi leader architectures, consensus mechanisms and their trade offs, consistency models including eventual consistency and strong consistency, cross region failover and disaster recovery, indexing and query routing in partitioned systems, transactional semantics and distributed transactions, and operational concerns such as backup, schema evolution, and performance tuning for distributed data stores.

MediumTechnical
71 practiced
You're responsible for designing transactional semantics for a shopping-cart service that must allow concurrent updates from multiple devices and support merging carts. Choose between eventual consistency with merge semantics and strict serializable transactions; justify your choice and outline the implementation approach.
MediumTechnical
54 practiced
Explain read-repair and anti-entropy (background) repair in replicated stores. Compare their roles, performance impacts, and when you would tune one over the other.
HardTechnical
69 practiced
Design an index compaction policy for a distributed document store that balances read performance and write amplification. Include metrics that drive compaction, compaction scheduling across shards, and how to avoid compaction storms.
MediumTechnical
93 practiced
Describe how write-ahead logging (WAL) and replication interact in a distributed database. What are the implications of shipping WAL segments asynchronously vs synchronously to replicas?
HardSystem Design
54 practiced
Design a schema-evolution strategy for a distributed database serving multiple microservices. Requirements: zero-downtime rollouts, backward and forward compatibility for a rolling deployment, and the ability to rollback a change.

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