Free
Distributed systems·Replication
Design a distributed key-value store
Store and serve keys across many nodes with tunable consistency.
Advanced 60 min
Distributed systems design interview questions
Distributed systems rounds test the building blocks underneath every large system: replication, partitioning, consensus, ordering and coordination. Design a distributed key-value store, a unique ID generator, a message queue, a lock service and a geo-replicated database.
Interviewers look for precise reasoning about consistency models, failure detection, leader election, and what each design gives up under network partitions.
Plus
Distributed systems·Coordination
Design a unique ID generator
Issue unique, roughly sortable IDs at high rate across data centers.
Beginner 30 min
Plus
Distributed systems·Messaging
Design a distributed message queue
Build a durable, partitioned log that producers and consumers can rely on.
Advanced 60 min
Plus
Distributed systems·Coordination
Design a distributed lock service
Let services coordinate exclusive access without deadlocks or split brain.
Advanced 60 min
Plus
Distributed systems·Consensus
Design leader election for a service cluster
Keep exactly one active coordinator while nodes come and go.
Advanced 60 min
Plus
Distributed systems·Replication
Design a geo-replicated database
Serve reads and writes from several regions with clear consistency trade-offs.
Advanced 60 min