1. Pipes and Filters intermediate

    A logistics platform processes tracking events through validation, enrichment, deduplication, state transition and fan-out. What does the pipes-and-filters shape buy, and where does it break down?

    2 min answer delhiverypipelinestagesbackpressure
  2. Pipes and Filters intermediate

    A nightly recommendation pipeline has one stage consuming 80% of the wall-clock time. How do you diagnose it and what are your options?

    3 min answer pipelinesbatchspotifyperformance
  3. Pipes and Filters intermediate

    A team splits a single batch job into seven stages connected by queues, so each stage can scale and be retried independently. Throughput improves. What have they given up, and when does that bill arrive?

    2 min answer pipes and filtersqueueslatencyoperability
  4. Pipes and Filters intermediate

    A video platform's transcoding pipeline is a sequence of independent processing stages. What does the pipes-and-filters structure buy, and what must be added for it to work at scale?

    2 min answer pipes-and-filterspipelinestagesbackpressure
  5. Platform Adoption intermediate

    A platform capability is objectively better than what teams are doing, and adoption is low. How should the gap be diagnosed?

    1 min answer adoptionmigrationincentivesdeveloper-experience
  6. Platform Adoption intermediate

    A platform team reports 90% of services are on the platform, and delivery has not improved. What is being measured wrongly?

    2 min answer meeshoadoptionoutcomesmetrics
  7. Platform API Deprecation intermediate

    A platform must deprecate an API or capability that many teams depend on. How is this done without destroying trust or stalling indefinitely?

    2 min answer deprecationplatformmigrationtrust
  8. Platform API Deprecation intermediate

    A platform must remove a widely-used internal API. How should the deprecation be run?

    2 min answer deprecationmigrationtelemetrycommunication
  9. Platform API Deprecation intermediate

    An internal platform must remove a capability that several teams depend on. How should the deprecation be run?

    2 min answer verceldeprecationinternal-apimigration
  10. Platform API Deprecation intermediate

    You need to retire a platform API used by 60 services. Describe the plan.

    2 min answer deprecationmigrationplatform
  11. Platform APIs intermediate

    A platform exposes APIs to internal teams. How should these differ from APIs exposed to external customers?

    2 min answer platform-apiinternalversioningcoupling
  12. Platform APIs intermediate Multiple choice

    Product teams need a Kafka topic and an object-storage bucket per service with quotas and retention that change over time. Should the platform expose a synchronous provisioning call that returns when the resource exists or a declarative resource reconciled by a controller or a pull request into a shared Terraform repository?

    3 min answer platform apideclarativereconciliationprovisioning