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Production Evidence - API Testing & Production Debugging Labs | Aporeon

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

Connection Pool Pressure

Pairs a bounded isolated reproduction with telemetry and a disposal fix for leaked database connections.

Hard~35 minStep 1 of 4

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1Connection Pool PressureRecommended startPairs 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

1Connection Pool PressureUp next / Hard / ~35 min
2Database Command GuardHard / ~35 min
3Correlated ErrorMedium / ~25 min

2

Database Command GuardUses a test-only DbCommandInterceptor to fail a regression when database command count grows with page size.Coding problemHard~35 min.NETASP.NET CoreC#

Practice

3Correlated 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

4Trace PropagationCaptures test activities to prove one incoming request and its outgoing HTTP dependency share trace context.Coding problemMedium~25 min.NETASP.NET CoreC#Practice

4Trace Propagation

Medium / ~25 min