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 Message Formats.

Quiz

A mobile client sends event times as "2027-03-28T02:30:00" with no offset. Nightly reporting has always been slightly off for European users, and on one Sunday in March about 40 minutes of events vanish from the daily rollup while a different Sunday in October shows some events twice. Diagnose it.

A producer team wants to rename a field in a published event schema. What do you tell them and what makes the answer enforceable?

A telemetry platform ingests billions of events daily from customer agents. Which message format should the wire protocol use, and what does the choice affect beyond size?

An events pipeline carries 2 billion events a day. Each event is JSON with 25 fields whose names average 14 characters. Roughly how many bytes a day go on field names alone, before compression?