Quiz

2948 questions of the kind that actually get asked — in interviews, in architecture review boards, and by the person who has to run the thing at 3 AM. Every answer states the trade-off rather than the slogan, and says when the obvious choice is the wrong one.

All areas2948 Architecture Fundamentals91 Distributed Systems101 Data Architecture90 Cloud Architecture87 Networking96 API & Integration Architecture87 Reliability & Resilience99 Observability92 Performance & Capacity Engineering100 Security Architecture105 Cost Architecture & FinOps102 Business Architecture103 Architecture Communication102 Enterprise Architecture100 Legacy Modernization102 AI-Era Architecture106 Software Architecture & Engineering93 Architecture Patterns94 Architecture Decision-Making101 The Architect's Meta-Skills102 Delivery & Release Engineering103 Platform Engineering & Developer Experience102 Testing & Quality Architecture102 Data Platform Architecture98 Streaming & Real-Time Data103 Data Governance & Semantics91 Frontend & Experience Architecture101 Edge, Mobile & IoT98 Regulatory & Data Protection Architecture99 Assurance, Audit & Model Risk98

Difficulty Any beginner intermediate advanced

4 questions in Concurrency.

Quiz

A platform must handle millions of concurrent connections per process cluster where most connections are idle most of the time. Which concurrency model fits, and what does the wrong choice cost?

A service handles 100 requests per second with a pool of 10 worker threads. The team raises the pool to 100 threads. Throughput stays at roughly 100 rps and p99 latency gets much worse. What is the primary reason?

A service holds a concurrency limit of 60 with a 50 ms mean service time and serves clients that give up after 2 seconds. Offered load triples. Where should the excess requests wait?

Why is limiting concurrency more effective than limiting request rate when protecting a service?