Quiz

2627 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 areas2627 Architecture Fundamentals81 Distributed Systems101 Data Architecture90 Cloud Architecture77 Networking86 API & Integration Architecture78 Reliability & Resilience88 Observability81 Performance & Capacity Engineering90 Security Architecture85 Cost Architecture & FinOps82 Business Architecture93 Architecture Communication91 Enterprise Architecture91 Legacy Modernization82 AI-Era Architecture86 Software Architecture & Engineering84 Architecture Patterns84 Architecture Decision-Making91 The Architect's Meta-Skills92 Delivery & Release Engineering93 Platform Engineering & Developer Experience92 Testing & Quality Architecture90 Data Platform Architecture88 Streaming & Real-Time Data93 Data Governance & Semantics81 Frontend & Experience Architecture91 Edge, Mobile & IoT88 Regulatory & Data Protection Architecture90 Assurance, Audit & Model Risk88

Difficulty Any beginner intermediate advanced

4 questions in Data Lifecycle & Retention.

Quiz

A GDPR erasure request arrives for a customer. Where does their data actually live, and what makes this expensive to retrofit?

A consumer fintech accumulates transaction, behavioural and derived data. How should retention, archival, deletion and regulatory holds be designed so they do not conflict?

A customer exercises their right to erasure. List every place their data plausibly exists in a mature architecture and how each is handled.

A file storage platform must permanently delete a user's data on request, while maintaining backups, replicas, caches and search indexes. What makes this genuinely difficult, and how is it designed?