1. Functional vs Non-Functional intermediate Multiple choice

    "Place an order" and "an order placed during the market open surge is acknowledged within 200ms at p99" — Zerodha needs both. Which one actually constrains the architecture, and why is that not obvious?

    1 min answer nfrzerodhatradinglatency
  2. Functional vs Non-Functional beginner Multiple choice

    A marketplace ships saved-search alerts. The functional spec is one sentence - email a seller when a new listing matches their saved query - and it works. Six weeks after launch, alerts arrive anywhere between 4 minutes and 9 hours after the listing appears, and nobody can say whether that is a defect, because no one wrote down how fresh an alert had to be. Which of these is the missing non-functional requirement?

    2 min answer non-functional-requirementsfreshnessquality-attributeconstraints
  3. Functional vs Non-Functional beginner Multiple choice

    A news organisation's site is functionally simple - editors publish articles and readers read them - yet its architecture is unusually elaborate. Which non-functional characteristic explains that, and what structure does it force?

    2 min answer nfrcachingcdnread-heavy
  4. Game Days advanced

    A commerce platform prepares for its highest-traffic event of the year. What should a game day rehearse that ordinary load testing does not?

    2 min answer game-dayspeak-readinessdegradationincident-response
  5. Game Days intermediate

    Design a game day for a payment service. What is the scenario, who is in the room, and what counts as success?

    2 min answer game-dayrehearsalincident-responsereadiness
  6. Game Days intermediate

    You have four hours, eight engineers and a payments platform that has never had a game day. Design the exercise. Be specific about what you inject, what you measure, and how you decide whether it succeeded.

    4 min answer game dayschaos engineeringhypothesisincident response
  7. Geo-Restriction & Sanctions advanced

    A platform must block access from sanctioned jurisdictions and restrict content by market. How is this implemented and where does it fail?

    1 min answer sanctionsgeo-blockingscreeningevasion
  8. Geo-Restriction & Sanctions intermediate Multiple choice

    A trading platform must prevent sanctioned parties and prohibited jurisdictions from using the service. Geo-IP blocking is in place at the edge, and compliance reports that sanctioned individuals are still being onboarded. Where should the primary enforcement point be?

    3 min answer sanctionsscreeninggeo-blockingkyc
  9. Geo-Restriction & Sanctions advanced

    A trading platform must restrict access by jurisdiction and screen against sanctions lists. What must the architecture handle?

    2 min answer coindcxsanctionsgeoscreening
  10. Geo-Restriction & Sanctions advanced

    Sanctions lists change weekly. What does your architecture need so that is not a compliance risk?

    2 min answer sanctionsscreeningrescreeningevidence
  11. GitOps intermediate

    A platform adopts a declarative, git-driven deployment model. What does it improve, and what does it not solve?

    2 min answer gitopsdeclarativedriftreconciliation
  12. GitOps intermediate

    A platform manages infrastructure declaratively and production has diverged from the declarations. Is that a failure of discipline?

    2 min answer rendergitopsdriftincident