1. Reversibility intermediate

    How should reversibility change how much analysis a decision receives, and how do you assess whether a decision is genuinely reversible?

    2 min answer reversibilitydecision-makingone-way-dooranalysis
  2. Reversibility advanced

    How should reversibility change the process applied to a decision, and which decisions are commonly misclassified?

    2 min answer reversibilityone-way-doorprocessspeed
  3. Reversibility intermediate

    You have limited time to deliberate. Which decisions on a new platform deserve it, and which should be made quickly?

    1 min answer decision-makingreversibilityprioritisation
  4. Security vs Usability intermediate

    A B2B SaaS with 900 tenants makes SAML single sign-on mandatory for every enterprise-plan tenant after a security review, and local passwords are deleted. Six weeks later an identity provider outage locks about 40 tenants out for three hours and support has no way to help. What did the mandate buy, what did it pay, and what should have existed first?

    2 min answer ssoidentityavailabilitybreak-glass
  5. Security vs Usability advanced

    A consumer finance product must balance fraud controls against onboarding friction. How should that trade-off be made rather than argued?

    2 min answer slicefraudfrictionrisk
  6. Security vs Usability intermediate

    A security control is being circumvented by most of the team. What do you conclude and what do you do?

    2 min answer securityusabilityworkaroundsfriction
  7. Security vs Usability advanced

    A security control materially reduces risk and adds friction to a developer workflow used thousands of times a day. How should the trade-off be made?

    2 min answer securityusabilityfrictionworkarounds
  8. Serverless vs Containers advanced

    A grocery-delivery marketplace moves its order-status API from long-running containers to per-request functions to stop paying for idle capacity overnight; traffic swings about 20x between trough and the evening peak. What did the team buy, and when does the bill arrive?

    2 min answer serverlesscontainersconnection-poolingcold-start
  9. Serverless vs Containers intermediate Multiple choice

    A publisher must choose between serverless functions and containers for its asynchronous processing. What decides it?

    2 min answer serverlesscontainersduty-cyclecold-start
  10. Serverless vs Containers intermediate

    A team must choose between serverless functions and containers for a new API with unpredictable, spiky traffic. Walk through the decision.

    2 min answer decisioncostoperations
  11. Serverless vs Containers intermediate

    A team must choose between serverless functions and long-running containers for a new workload. Which characteristics decide it?

    2 min answer renderserverlesscontainersworkload
  12. Serverless vs Containers advanced

    An image-derivative pipeline runs as functions: about 270 million invocations a month at roughly 1.8 seconds and 2 GB of memory each, costing about 16000 dollars a month at 2026 per-invocation prices. The team wants to move it to a container fleet on one-year reserved capacity. Give the sequence, say where output can diverge, and name the point of no return.

    3 min answer serverlesscontainersmigrationcost