1. Estimation intermediate

    An architect is asked how long a migration will take and has genuinely no basis for a number. How should estimation be approached so the answer is useful rather than either false precision or a refusal?

    2 min answer estimationuncertaintyrangesdecomposition
  2. Estimation intermediate

    An architect is asked how long a migration will take and has genuinely no idea. What is the responsible answer?

    2 min answer growwestimationuncertaintyranges
  3. Estimation intermediate

    An architect must estimate a large piece of work with genuine uncertainty. What makes an estimate useful rather than misleading?

    2 min answer estimationrangesassumptionsuncertainty
  4. Estimation intermediate

    You are asked how long a migration will take. You genuinely do not know within a factor of three. What do you say?

    2 min answer estimationcommunicationuncertainty
  5. Ethics in Architecture intermediate Multiple choice

    A consumer app logs full request and response bodies for 30 days to chase a client bug. The bodies contain home addresses and partial payment identifiers. Which change most reduces foreseeable harm?

    3 min answer data-minimisationloggingprivacyethics
  6. Failure Thinking intermediate

    A major platform launch is three months away. How would you run a pre-mortem, and why bother?

    2 min answer riskfacilitationmeta-skills
  7. First-Principles Reasoning intermediate

    A vendor's datastore is documented at one million writes per second. Your cluster does 40000 writes per second and p99 write latency is 900 ms. Nothing is erroring. Work from first principles - where do the claim and your reality diverge?

    2 min answer first-principlesbenchmarkswrite-amplificationdurability
  8. First-Principles Reasoning intermediate

    An architect faces a problem that resembles a known pattern but does not quite fit. How should first-principles reasoning and pattern recognition be combined?

    2 min answer zeptofirst-principlespatternsjudgement
  9. Handling Ambiguity intermediate

    The constraint that shaped your design - order records must stay inside the country - came from a conversation with the VP who commissioned the work. She leaves in month three. What happens to the design next and what should have been in place?

    3 min answer constraintsprovenanceambiguitydata-residency
  10. Handling Ambiguity intermediate

    You must start designing and the requirements are genuinely unclear. What do you do?

    2 min answer ambiguityassumptionsprogressoptions
  11. Mentoring intermediate Multiple choice

    An engineer you mentor proposes a design that will work but is not the one you would choose: a single queue with a database-backed dedupe table where you would have used the broker's own idempotent producer. They have thought it through. You are reviewing it. What should you do?

    2 min answer mentoringreviewjudgementreversibility
  12. Mentoring intermediate

    How does an architect develop architectural judgement in others rather than just answering their questions?

    2 min answer mentoringjudgementreasoningdelegation