Quiz

2707 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 areas2707 Architecture Fundamentals81 Distributed Systems101 Data Architecture90 Cloud Architecture87 Networking86 API & Integration Architecture78 Reliability & Resilience88 Observability81 Performance & Capacity Engineering90 Security Architecture95 Cost Architecture & FinOps92 Business Architecture93 Architecture Communication91 Enterprise Architecture91 Legacy Modernization92 AI-Era Architecture96 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 Architecture98 Streaming & Real-Time Data93 Data Governance & Semantics91 Frontend & Experience Architecture91 Edge, Mobile & IoT88 Regulatory & Data Protection Architecture90 Assurance, Audit & Model Risk98

Difficulty Any beginner intermediate advanced

5 questions in Backfill & Reprocessing.

Quiz

A bug in a streaming job produced wrong results for three weeks. How should the backfill be designed so it does not cause a second incident?

A bug is found in a stream processor that has been running for a month. How should the correction be handled?

A logic bug means six months of a derived table are wrong. You must reprocess without disrupting live consumers. How?

A transformation bug means months of derived data are wrong. What makes reprocessing feasible, and what breaks it?

You reprocess six months of events through an updated job to fix a calculation error. Support is flooded with customer complaints. What went wrong?