System Design Interview Prep Quiz Welcome to your System Design Interview Prep Quiz 1. System Design Need real-time fraud detection from transactions. Best architecture? Choose the best architectural decision.Deselect Answer Event streaming + Rules Engine Email Nightly batch FTP None 2. System Design What is the primary goal of bounded context? Choose the best architectural decision.Deselect Answer Shared entities Single schema Clear domain ownership More joins None 3. System Design Which deployment strategy allows instant rollback? Choose the best architectural decision.Deselect Answer Blue-Green Manual copy FTP Big Bang None 4. System Design Design Google Drive. File chunks should be stored in? Choose the best architectural decision.Deselect Answer RDBMS BLOB only Distributed object storage Redis Kafka None 5. System Design Users expect notifications even if one provider fails. Best design? Choose the best architectural decision.Deselect Answer Single provider Cron job Multiple notification providers with fallback Manual retry None 6. System Design Which metric best measures service reliability? Choose the best architectural decision.Deselect Answer Heap size Error rate and availability Class count Disk capacity None 7. System Design Designing a news feed requires fast timeline retrieval. Common optimization? Choose the best architectural decision.Deselect Answer Pre-compute timelines Full table scan One giant query Disable indexes None 8. System Design What should be externalized from microservices? Choose the best architectural decision.Deselect Answer Configuration Entities Business logic Controllers None 9. System Design Best approach for distributed locking? Choose the best architectural decision.Deselect Answer Local synchronized block Static variable HashMap Redis/ZooKeeper based lock None 10. System Design Which pattern prevents one failing dependency from exhausting all threads? Choose the best architectural decision.Deselect Answer Singleton Bulkhead Strategy Factory None 11. System Design How should synchronous service calls be protected? Choose the best architectural decision.Deselect Answer Infinite retries No timeout Timeouts + Retries + Circuit Breaker Restart service None 12. System Design Which design best supports auditability of financial transactions? Choose the best architectural decision.Deselect Answer Cache only Immutable event log Delete old records Update rows in place None 13. System Design Which principle should guide every system design interview? Choose the best architectural decision.Deselect Answer Always choose NoSQL Balance scalability, reliability, performance and cost Always use cache Always choose microservices None 14. System Design Which deployment detects production issues early? Choose the best architectural decision.Deselect Answer Canary Deployment Manual deployment Weekend release Big Bang None 15. System Design An e-commerce flash sale causes overselling. Best solution? Choose the best architectural decision.Deselect Answer Inventory reservation with atomic updates Restart DB Increase cache Cron reconciliation None 16. System Design Which architecture supports millions of IoT events? Choose the best architectural decision.Deselect Answer Single monolith Desktop app FTP Event-driven architecture None 17. System Design A recommendation service fails. What should homepage do? Choose the best architectural decision.Deselect Answer Graceful degradation Restart JVM Crash application Return HTTP 500 None 18. System Design Which pattern prevents duplicate order submissions? Choose the best architectural decision.Deselect Answer Idempotency Token More memory Static variables Queue only None 19. System Design Which design supports replaying business events? Choose the best architectural decision.Deselect Answer Event Sourcing CRUD only Batch files Cache None 20. System Design Which database fits user session storage at massive scale? Choose the best architectural decision.Deselect Answer Object Storage Graph DB Data Warehouse Redis None 21. System Design What should own its database in a microservices architecture? Choose the best architectural decision.Deselect Answer Each service API Gateway Frontend All services share one DB None 22. System Design How should large report generation be handled? Choose the best architectural decision.Deselect Answer HTTP request thread Async background job UI thread Synchronous DB None 23. System Design To avoid cascading retries across services, use? Choose the best architectural decision.Deselect Answer No timeout Exponential backoff with jitter Infinite retries Restart JVM None 24. System Design What is the biggest drawback of a shared database? Choose the best architectural decision.Deselect Answer Tight coupling Simpler ownership Better scalability Independent deployments None 25. System Design Orders and payments require independent recovery. Use? Choose the best architectural decision.Deselect Answer Single DB Saga Pattern Cron 2PC everywhere None 26. System Design A video streaming platform must reduce buffering worldwide. Best architecture? Choose the best architectural decision.Deselect Answer CDN + Edge Caching Bigger DB Shared folder Single data center None 27. System Design Which design simplifies independent deployments? Choose the best architectural decision.Deselect Answer Shared codebase Shared session Shared schema Database per service None 28. System Design Best place to terminate SSL/TLS? Choose the best architectural decision.Deselect Answer Redis Load Balancer/API Gateway Database Kafka None 29. System Design Need to migrate from monolith with low risk. First step? Choose the best architectural decision.Deselect Answer Rewrite everything Extract one bounded context Replace database Move UI first None 30. System Design A recommendation engine should process user behavior continuously. Best approach? Choose the best architectural decision.Deselect Answer Streaming pipeline Cron mail Weekly batch only Shared Excel None Loading questions... Loading questions... Please fill in the comment box below. Previous Start Quiz Next Time's up
