Quiz

2988 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 areas2988 Architecture Fundamentals91 Distributed Systems111 Data Architecture100 Cloud Architecture97 Networking96 API & Integration Architecture97 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 Consensus Protocols.

Quiz

A 3-node Raft cluster in a single data centre must become 5 nodes across three data centres, live, with no unavailable window. Give the sequence, and say what goes wrong if the two new members are added in one step.

A configuration change must propagate to thousands of edge locations worldwide within seconds, while remaining safe against a bad global configuration. What consistency and rollout properties does the propagation system need?

A metadata store on a 5-node Raft group serves 50k reads per second against 2k writes per second. Reads must be linearizable and the read path must not add a network round trip. Which read path fits?

Where does consensus belong in an architecture, and where is it a mistake?