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Aporeon

Technical interview practice, from one developer to another.

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ASP.NET Core Practical API Labs

Reliable Writes

Idempotency, concurrency preconditions, and atomic bulk commands.

3 drillsPractice one at a timeOrdered pathCoding problem

Recommended start

Idempotent POST

Stores an idempotency key, request hash, and response in the same transaction as the created resource.

Hard~35 minStep 1 of 3

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1Idempotent POSTRecommended startStores an idempotency key, request hash, and response in the same transaction as the created resource.Coding problemHard~35 min.NETASP.NET CoreC#Practice 2If-Match ConcurrencyMaps an HTTP ETag precondition to EF Core rowversion and returns 412 when the representation is stale.Coding problemHard~35 min.NETASP.NET CoreC#Practice 3Atomic Bulk UpdateValidates a bounded command set completely before applying all updates in one SaveChanges transaction.Coding problemMedium~25 min.NETASP.NET CoreC#Practice

Practice order

3 drillsOne at a time

1Idempotent POSTUp next / Hard / ~35 min
2If-Match ConcurrencyHard / ~35 min
3Atomic Bulk UpdateMedium / ~25 min