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Aporeon interview preparation

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Message Queues & Events

Event Streaming

Event schemas, partitions, consumer groups, offsets, replay, retention, compaction, and broker outage behavior.

7 drillsPractice one at a timeOrdered pathConcept questionArchitecture scenarioDebugging scenario

Recommended start

Event Versioning

Explains event schema evolution, backward compatibility, additive changes, consumer rollout, and contract ownership.

Hard~9 minStep 1 of 7

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1Event VersioningRecommended startExplains event schema evolution, backward compatibility, additive changes, consumer rollout, and contract ownership.Concept questionHard~9 minAmazon SNSAzure Service BusKafkaPractice 2

Practice order

7 drillsOne at a time

1Event VersioningUp next / Hard / ~9 min
2Partition KeyHard / ~12 min
3Consumer OffsetsHard / ~9 min
4

Partition KeyExplains partition key selection for ordering, load distribution, hot keys, and consumer scalability.Architecture scenarioHard~12 minAzure Service BusKafka

Practice

3Consumer OffsetsExplains how consumer groups share event-stream work and how offset commits affect duplicate or lost processing.Concept questionHard~9 minKafkaPractice

4Replay and BackfillExplains how to reprocess event streams safely for new projections, bug fixes, and data repair.Architecture scenarioHard~12 minAmazon SNSAzure Service BusKafkaPractice

5Exactly-once CaveatExplains why exactly-once claims do not remove the need for idempotent side effects and consistency boundaries.Concept questionHard~9 min.NETAmazon SNSAmazon SQSPractice

6Retention and CompactionChooses event retention and compaction from consumer outage, replay, rebuild, audit, and disaster-recovery requirements rather than storage cost alone.Concept questionMedium~7 minKafkaPractice

7Broker OutageExplains how systems behave when the broker is down or slow and how backpressure protects callers and dependencies.Debugging scenarioHard~12 min.NETAmazon SNSAmazon SQSPractice

Replay and Backfill

Hard / ~12 min

5Exactly-once CaveatHard / ~9 min

6Retention and CompactionMedium / ~7 min

7Broker OutageHard / ~12 min

Event Streaming - Message Queues & Events | Aporeon