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Quiz

2777 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 areas2777 Architecture Fundamentals81 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-Making91 The Architect's Meta-Skills92 Delivery & Release Engineering93 Platform Engineering & Developer Experience92 Testing & Quality Architecture102 Data Platform Architecture98 Streaming & Real-Time Data93 Data Governance & Semantics91 Frontend & Experience Architecture91 Edge, Mobile & IoT88 Regulatory & Data Protection Architecture99 Assurance, Audit & Model Risk98
Difficulty Any beginner intermediate advanced

2777 questions.

  1. Domain Boundaries advanced

    A B2B commerce and financing business is deciding where to draw the boundary between its commerce and credit domains. What should determine it?

    2 min answer ofbusinessdomainsboundariescredit
  2. Domain Boundaries advanced

    A marketplace is deciding whether "listing" and "inventory" are one domain or two. How should the boundary be decided, and what evidence settles it?

    2 min answer domain-boundariesbounded-contextlanguageownership
  3. Domain Boundaries advanced

    The word "customer" means different things in sales, fulfilment and finance. How does that affect your service design?

    2 min answer dddbounded-contextcanonical-modelubiquitous-language
  4. Domain Boundaries advanced

    Twilio announced the acquisition of Segment in October 2020 for about $3.2 billion in stock and closed it in November 2020, adding a customer-data platform alongside its messaging and voice APIs. Buying a product in an adjacent domain buys that domain's boundary along with its code. What does the acquirer gain, what does it pay, and when does that bill arrive?

    3 min answer twiliosegmentacquisitionbounded-context
  5. Domain Boundaries advanced

    Walk me through how you would choose the first capability to extract from a fifteen-year-old monolith, given that leadership expects visible progress within two quarters.

    3 min answer monolithextractionboundariessequencing
  6. Domain-Driven Design advanced

    Walk me through how you would size an aggregate in a marketplace of eBay's shape, where one seller can hold 80,000 active listings. Then tell me what your choice costs at runtime.

    3 min answer dddaggregateconcurrencyinvariants
  7. Domain-Driven Design advanced

    Where does domain-driven design pay for itself in a large marketplace, and where is it overhead?

    2 min answer dddubiquitous-languagecomplexityboundaries
  8. Domain-Driven Design advanced

    You are decomposing a monolith. How do you find the boundaries using evidence rather than opinion?

    2 min answer dddbounded-contextschange-correlationevent-storming
  9. DORA Metrics intermediate

    A team measures deployment frequency, lead time, change failure rate and recovery time. How should these be used, and how are they misused?

    2 min answer verceldorametricsdelivery
  10. DORA Metrics intermediate

    An organisation adopts delivery metrics and teams begin optimising the numbers rather than the outcomes. What went wrong, and how should the metrics be used?

    2 min answer dorametricsgoodhartoutcomes
  11. DORA Metrics intermediate

    An organisation adopts the four DORA metrics and delivery does not improve. What are the metrics for, and how are they commonly misused?

    2 min answer dorametricsdeliverygoodhart
  12. DORA Metrics advanced

    Deployment frequency is monthly and change failure rate is 30%. Which do you attack first and why?

    2 min answer dorabatch-sizedeploymentstability