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

3 questions in Legacy Modernization.

Quiz

A 6 TB order history must be backfilled into a new store before cutover. The link sustains 1 Gbps and the target ingests about 40 MB/s per writer. Roughly how long is the backfill, and which assumption decides whether it fits one weekend?

A team plans to move 2.5 TB to a new database by taking the application offline at 22:00 on Saturday, restoring a backup into the new store, and switching over by 08:00 Sunday. The data copies fine in a test at one tenth the volume. Why does this plan usually fail before it is executed?

A new notifications service needs customer contact data that only a twelve-year-old billing system holds. The team points it at a read replica of the billing database and ships in a week. Why does this work, and why is it still the most expensive integration they could have chosen?