#replication

8 replication interview questions, asked at Amazon, Google, Microsoft and 4 more companies. Last asked Sep 2026.

Design distributed storage for build artifactsSystem designDesign a storage system for build artifacts: binaries, packages and archives produced by the build pipeline that later stages download to test and deploy. Cover the upload and…
Last asked Sep 2026
High availability and failover for a primary-replica databaseSystem designExplain how to keep a primary-replica database available: how replication works, how a failed primary is detected, how a replica is promoted, and how you avoid losing writes or…
Last asked Jun 2026
+5
Design a distributed key-value storeSystem designStore and serve billions of keys with low latency, partitioned across machines and replicated to survive failures, with tunable consistency.
Last asked Jun 2026
Design a cloud database's write path and crash recoverySystem designDesign how writes flow through a managed cloud relational database: from a client's commit to durable storage, how the data is replicated across machines or zones, and how the…
Last asked Jan 2026
Design a globally consistent metadata serviceSystem designDesign a metadata service that stays strongly consistent across regions: every read reflects the latest committed write wherever it is served. Cover the data model, how writes are…
Last asked Jan 2026
Compare Paxos and RaftSystem designExplain how Paxos and Raft reach consensus and how they differ: leader election, log replication, how each handles failures and network partitions, and why Raft is considered…
Last asked Sep 2025
+2
Design a Kafka-like distributed message queueSystem designDesign a durable, partitioned log that producers append to and many consumer groups read at their own pace, surviving broker failures without losing acknowledged messages.
Last asked Sep 2025
Diagnose inconsistent data in a distributed databaseSystem designUsers report reading different values for the same record from a replicated database. How do you find the cause? Go through replication lag, read and write consistency settings…
Last asked Sep 2025