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

6 questions in Sagas & Compensation.

Quiz

A long-running customer workflow spanning payment, verification, notification and fulfilment must survive worker crashes and deploys mid-flow. Compare a hand-written saga with a durable-execution engine.

A marketplace charges the customer, pays the merchant, pays the courier and takes a fee. Design the transaction, and say what happens if the courier payment fails.

A service updates its database and then publishes an event. Occasionally downstream systems are missing records. Diagnose and fix.

A shipping aggregator books a shipment across carrier, warehouse, payment and notification systems, with no shared transaction available. Which coordination pattern fits, and what are the compensations that cannot exist?

Design the order-fulfilment saga for a marketplace where sellers can cancel, buyers can cancel, payments can fail asynchronously hours later, and items are unique. What states and compensations are required, and where does orchestration beat choreography?

In an order saga, the shipment service permanently rejects an order after the card has been captured. What now?