Patrons
Séries d'entraînement
- Streams, metrics & aggregation5 questions
- AI platforms, agents & model systems18 questions
- Realtime chat, sync & collaboration9 questions
- Search, retrieval & ranking18 questions
- Payments, ledgers & idempotency15 questions
- Inventory, reservations & queues21 questions
- Geo, matching & dispatch7 questions
- Storage, media & content delivery19 questions
- Reliability, async delivery & jobs23 questions
- Abuse, rate limits & policy control13 questions
- Caching, partitioning & hot-path scale26 questions
- Core system design foundations1 questions
Concepts
- Sharding and Hot-Key Mitigation16 questions
- Idempotency Key12 questions
- Async Job Queue10 questions
- Persistent Connection Management9 questions
- Rate Limiting / Quota8 questions
- State Machine + Idempotent Transitions8 questions
- Latency Budget Decomposition6 questions
- Pub/Sub Fan-out6 questions
- Reconciliation / Background Repair6 questions
- Reservation Hold with TTL6 questions
- Access Control Filtering (ACL)5 questions
- Cache-Aside and Stampede Control5 questions
- Feature Store / Point-in-Time Correctness5 questions
- Geospatial Indexing5 questions
- Multi-Provider Routing / Failover5 questions
- Notification Delivery and Routing5 questions
- Streaming Windowed Aggregation5 questions
- Virtual Queue / Admission Control5 questions
- ANN Vector Index4 questions
- Human-in-the-Loop Review4 questions
- Multi-Stage Ranking Funnel4 questions
- Quorum Replication and Failover4 questions
- Retry with Backoff + Dead-Letter4 questions
- Two-Tower Retrieval4 questions
- Agentic Tool-Calling Loop3 questions
- Backpressure and Load Shedding3 questions
- Bias Correction (Position/Counterfactual)3 questions
- Conflict-Free Collaboration (OT/CRDT)3 questions
- Double-Entry Ledger3 questions
- Elastic Worker Autoscaling3 questions
- Inverted Index Search3 questions
- Metadata/Data Separation3 questions
- Offline/Online Evaluation and A/B Testing3 questions
- Optimistic Concurrency Control3 questions
- Precomputed Read View3 questions
- Probabilistic Data Structures3 questions
- Real-Time Rules/Policy Engine3 questions
- Saga / Compensating Transaction3 questions
- Top-K Ranking3 questions
- Atomic Counter Inventory2 questions
- Capacity Estimation and Scale Sizing2 questions
- Chunked Transfer + Content-Hash Dedup2 questions
- Distributed Lock / Lease Fencing2 questions
- Edge Caching / CDN2 questions
- LLM Safety Guardrails2 questions
- Optimistic Local Update + Reconciliation2 questions
- RAG Grounding and Citation2 questions
- Resource Scheduling and Preemption2 questions
- Retention and Versioning Tiers2 questions
- Sandboxed Execution2 questions