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2667 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 areas2667 Architecture Fundamentals81 Distributed Systems101 Data Architecture90 Cloud Architecture87 Networking86 API & Integration Architecture78 Reliability & Resilience88 Observability81 Performance & Capacity Engineering90 Security Architecture95 Cost Architecture & FinOps92 Business Architecture93 Architecture Communication91 Enterprise Architecture91 Legacy Modernization92 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

81 questions in Architecture Fundamentals.

  1. Architecture Styles intermediate Multiple choice

    A browser-based design tool in Canva's mould lets users export a 40-page document to PDF, a 90-second animation to MP4 or a print-ready file. Export work takes anywhere from 3 seconds to 11 minutes, about 60000 a day, bursting around 09:00 in each region. All three run inside the synchronous web tier today and p99 export requests are killed by the load balancer at 60 seconds. Which architecture style should the export path use?

    3 min answer architecture-stylesasync-processingjob-queuemedia-rendering
  2. Architecture Styles advanced

    A developer-deployment platform must run builds, schedule long-lived services, stream logs and provision databases. Which architectural style fits, and what is the most common mistake in choosing?

    1 min answer architecture-stylesrenderrailwaycontrol-plane
  3. Architecture Styles intermediate Multiple choice

    A news organisation runs a normal publishing platform for most of the year and an entirely different traffic profile on election night. Which architecture style should the read path use, and how does that differ from the style appropriate to the newsroom's editing tools?

    2 min answer architecture-stylesread-pathcachingnew-york-times
  4. Architecture Styles advanced

    You are choosing an architecture style for a new B2B SaaS product. Six engineers. Enterprise customers with data residency requirements in three regions. Which style and why?

    2 min answer stylesmulti-tenancydata-residencymonolith
  5. Cohesion advanced Multiple choice

    A search company must decide where the rules deciding which documents are eligible to appear for a query should live - the crawler, the indexer, the query serving layer, or a dedicated component. Which choice best reflects cohesion?

    2 min answer cohesionsearchbaiduboundaries
  6. Cohesion intermediate

    A subscription-billing platform has an "invoice service" that generates invoices, sends dunning emails, computes tax, syncs to accounting systems and renders PDFs. Is that cohesive? How would you decide?

    1 min answer cohesionchargebeebillingboundaries
  7. Cohesion intermediate Multiple choice

    Every meaningful feature in a platform requires changes to at least nine services and three teams. Which architectural property has failed and what is the diagnostic?

    2 min answer cohesionboundariesconways-lawspotify
  8. Cohesion beginner

    Review this. An internal library called platform-common holds an HTTP client, a feature-flag reader, a money type, a retry helper and tenant-context propagation. 140 services depend on it. A one-line bugfix to the money type produces version 4.12.0, and until each service upgrades it is running a version missing the fix. The last upgrade wave took eleven weeks. What would you split, and what would you leave alone?

    3 min answer cohesionshared-librariesversioningrelease-cadence
  9. Conway's Law advanced

    A B2B marketplace splits into supplier-onboarding, catalogue, pricing and fulfilment services. Eighteen months later every meaningful feature requires all four teams. What does Conway's Law say happened, and what are the two available fixes?

    1 min answer conways-lawmoglixb2bteam-topology
  10. Conway's Law intermediate

    Two teams own two deployables: a reader-facing API and a mobile backend-for-frontend that calls it. They are merged into one team of nine with one backlog and one standup. What happens to the interface between those two services over the next two quarters, and what would you do about it now?

    3 min answer conways-lawteam-topologiesservice-boundariesfitness-functions
  11. Conway's Law advanced

    What happens if an edge platform's configuration system is built by three teams - one owning the config language, one owning global propagation, one owning the edge runtime - and each team ships on its own schedule with its own API? Predict the architectural consequence.

    2 min answer conways-laworganisationedgefastly
  12. Conway's Law advanced

    You design service boundaries along domain lines. They cut across three existing teams. What happens and what do you do?

    2 min answer organisationboundariesconway