MEDIUMCoding & Algorithms
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Implement topological sort and tree boundary traversal
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Snowflake Interview Questions
88
MEDIUMSystem Design
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Design a Cron Job Scheduler
Distributed Systems ConsensusIdempotency and At-Least-Once/Exactly-OnceMessage QueuesCron Expressions and Scheduling Algorithms
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EASYSystem Design
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Design a disk-backed KV store under contention
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MEDIUMSystem Design
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Design a distributed tree node counter
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HARDSystem Design
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Design a multi-tenant quota system
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MEDIUMSystem Design
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Design an object store with deduplication
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MEDIUMCoding & Algorithms
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Compute effective permissions on DAG and prune tree
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HARDCoding & Algorithms
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Implement course scheduling and rate limiter analysis
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HARDCoding & Algorithms
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Implement an in-memory file system
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HARDSystem Design
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Distributed Caching StrategiesConsistency ModelsHierarchical Data Structures and Access CoMicroservices Communication Patterns
HARDSystem Design
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Columnar Storage FormatsSeparation of Compute and StorageDistributed Query EnginesMulti-Tenancy Isolation Models
MEDIUMCoding & Algorithms
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HARDCoding & Algorithms
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HARDSystem Design
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HARDSystem Design
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API Gateway / Service MeshCode Generation vs. Reflection/Dynamic ProIdempotency and Retry StrategiesAPI Versioning and Schema Evolution
HARDSystem Design
AI Prep
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Directed Acyclic Graphs and Topological SoScheduling AlgorithmsConcurrency Control and Resource ManagemenState Machines and Idempotency