Quiz
2908 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 areas2908
Architecture Fundamentals91
Distributed Systems101
Data Architecture90
Cloud Architecture87
Networking86
API & Integration Architecture87
Reliability & Resilience99
Observability92
Performance & Capacity Engineering100
Security Architecture95
Cost Architecture & FinOps102
Business Architecture103
Architecture Communication102
Enterprise Architecture100
Legacy Modernization92
AI-Era Architecture96
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
3 questions in Connection Pooling.
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Connection Pooling intermediate
A checkout handler takes a pooled database connection at the start of the request and releases it at the end. In between it calls a partner API that takes 300 ms at p50. Traffic is 400 requests per second and the SQL itself takes 15 ms. Roughly how large must the pool be and what is the better answer?
3 min answer connection-poolinglittles-lawthird-partypool-sizing -
Connection Pooling intermediate
A service scales its application instances from 20 to 200 and the database begins refusing connections. What happened, and what is the correct architecture?
2 min answer connection-poolingproxyscalingdatabase-limits -
Connection Pooling intermediate
A service works fine at 10 instances. At 60 instances during a peak, the database starts refusing connections. Explain the arithmetic.
2 min answer poolsscalingdatabases