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Quiz

2707 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 areas2707 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 Architecture96 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 Architecture98 Streaming & Real-Time Data93 Data Governance & Semantics91 Frontend & Experience Architecture91 Edge, Mobile & IoT88 Regulatory & Data Protection Architecture90 Assurance, Audit & Model Risk98
Difficulty Any beginner intermediate advanced

2707 questions.

  1. Backfill & Reprocessing advanced

    A transformation bug means months of derived data are wrong. What makes reprocessing feasible, and what breaks it?

    2 min answer backfillreprocessingretentionisolation
  2. Backfill & Reprocessing advanced

    You reprocess six months of events through an updated job to fix a calculation error. Support is flooded with customer complaints. What went wrong?

    2 min answer replayside-effectsdesign
  3. Backpressure & Flow Control advanced

    A logistics platform ingests location updates from a large vehicle fleet every few seconds. The ingestion queue grows steadily even though workers are healthy. How do you determine the cause, and what are the possible fixes?

    2 min answer delhiverybackpressureingestionqueue-depth
  4. Backpressure & Flow Control advanced

    A telemetry ingestion queue grows continuously even though every worker reports healthy and CPU is moderate. How do you distinguish between insufficient capacity, a slow downstream dependency, oversized messages, poison messages and an incorrect workload model?

    2 min answer backpressurequeuesdebuggingdatadog
  5. Backpressure & Flow Control advanced

    A worker's queue depth grows steadily through the day and never recovers. Adding workers helps for an hour, then it resumes. What is happening?

    2 min answer backpressurecapacityqueues
  6. Backpressure & Flow Control advanced

    An IoT ingestion pipeline is falling behind. The devices cannot be slowed down. What are your options?

    2 min answer backpressureedgeoverload
  7. Backup Strategies advanced

    A backup and data-protection platform stores enormous volumes across many customers. What determines whether the architecture is actually a recovery system rather than a storage system?

    2 min answer druvabackuprecoveryrto
  8. Backup Strategies advanced

    A company discovers during an incident that five separate backup and replication mechanisms all failed to produce a usable recovery point. What class of failure is this, and what practice prevents it?

    2 min answer backupsverificationrestore-testinggitlab
  9. Backup Strategies advanced

    A ransomware exercise asks: can you restore the production database to a point before the encryption? What must be true?

    2 min answer backupransomwarerecovery
  10. Backup Strategies advanced

    A team says "backups run nightly and are retained for 30 days". You have one hour to assess whether they could actually recover. What do you check?

    2 min answer backuprecoveryransomwareverification
  11. Backward Compatibility advanced

    Salesforce scheduled the retirement of Platform API versions 21.0 through 30.0 for the Summer '23 release and later postponed it to Summer '25, having retired versions 7.0 through 20.0 in Summer '22. After retirement, REST calls on a retired version return 410 Gone. What does a postponement of that size tell you about deprecation as a mechanism, and what would you build so that yours does not slip?

    3 min answer salesforcedeprecationapi versioningsunset
  12. Backward Compatibility intermediate

    What happens if an enterprise software vendor adds a required field to a widely-integrated interface, believing it is a minor change?

    2 min answer backward-compatibilitybreaking-changeintegrationenterprise