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Aporeon interview preparation

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API Testing & Production Debugging Labs

Production Evidence

Database command guards, correlated failures, distributed traces, and connection-pool diagnosis.

4 drillsPractice one at a timeOrdered pathCoding problem

Recommended start

Database Command Guard

Uses a test-only DbCommandInterceptor to fail a regression when database command count grows with page size.

Hard~35 minStep 1 of 4

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1Database Command GuardRecommended startUses a test-only DbCommandInterceptor to fail a regression when database command count grows with page size.Coding problemHard~35 min.NETASP.NET CoreC#Practice 2Correlated ErrorTests that an unexpected failure returns a safe correlation identifier and records the same value in structured logs.Coding problemMedium~25 min.NETASP.NET CoreC#Practice 3Trace PropagationCaptures test activities to prove one incoming request and its outgoing HTTP dependency share trace context.Coding problemMedium~25 min.NETASP.NET CoreC#Practice 4Connection Pool PressurePairs a bounded isolated reproduction with telemetry and a disposal fix for leaked database connections.Coding problemHard~35 min.NETASP.NET CoreC#Practice

Practice order

4 drillsOne at a time

1Database Command GuardUp next / Hard / ~35 min
2Correlated ErrorMedium / ~25 min
3Trace PropagationMedium / ~25 min
4Connection Pool PressureHard / ~35 min