Quiz

2827 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 areas2827 Architecture Fundamentals91 Distributed Systems101 Data Architecture90 Cloud Architecture87 Networking86 API & Integration Architecture87 Reliability & Resilience99 Observability92 Performance & Capacity Engineering90 Security Architecture95 Cost Architecture & FinOps92 Business Architecture93 Architecture Communication91 Enterprise Architecture100 Legacy Modernization92 AI-Era Architecture96 Software Architecture & Engineering93 Architecture Patterns84 Architecture Decision-Making101 The Architect's Meta-Skills92 Delivery & Release Engineering103 Platform Engineering & Developer Experience92 Testing & Quality Architecture102 Data Platform Architecture98 Streaming & Real-Time Data93 Data Governance & Semantics91 Frontend & Experience Architecture101 Edge, Mobile & IoT98 Regulatory & Data Protection Architecture99 Assurance, Audit & Model Risk98

Difficulty Any beginner intermediate advanced

2827 questions.

Quiz

A brokerage proposes event sourcing for its account ledger. What requirements would genuinely justify it, and when is conventional state plus an audit trail the safer choice?

A neobank stores every account change as an immutable fact rather than a mutable balance. Which needs justify this, how are balances materialised for fast reads, and what happens when a projection is found to be wrong?

A system is event-sourced. A customer exercises their right to erasure. The event log is immutable. How do you comply?

A team wants event sourcing for a new order service, citing audit requirements. What do you recommend?

An organisation wants event sourcing for its order platform because it is considered scalable. What business or audit requirements would actually justify it, and when is CRUD plus an audit log safer?

A platform considers event sourcing for auditability. What is the permanent cost teams underestimate, and what is the cheaper alternative?

A team proposes event sourcing for a customer preferences service. What questions do you ask?

Design the data model for recording money movement in a marketplace. What properties are non-negotiable?

A downstream consumer has been failing for four days. Your event log retains three days. What happens?

A platform processes billions of events per day and requires ordering per customer but not globally. How should partition keys and consumer groups deliver that without creating a serialisation bottleneck?

A ride-hailing platform must process billions of location and trip events per day, with per-trip ordering. Design the partitioning, consumer scaling and failure handling.