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

4 questions in Messaging & Queues.

Quiz

A flash sale causes an incident. Two hours later the fault is fixed but 4 million jobs are backed up and notifications are hours late. Walk through recovery and prevention.

A notification service must deliver push notifications for mentions. What delivery guarantee do you offer, and how do you avoid sending duplicates?

A team proposes an event-streaming platform for a background job workflow processing a few hundred thousand jobs a day. What is gained, what is paid for, and when is a database-backed queue the better engineering decision?

For each of these, choose a queue or a stream and justify it — order fulfilment tasks, an audit trail, cache invalidation, and rebuilding a search index.