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Aporeon

Technical interview practice, from one developer to another.

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EF Core Practical Data Access Labs

Transactions & Reliability

Outbox persistence, retriable transactions, idempotency, and request cancellation.

3 drillsPractice one at a timeOrdered pathCoding problem

Recommended start

Order Plus Outbox

Persists domain state and its outbox message in one SaveChanges transaction without publishing inside the request transaction.

Medium~25 minStep 1 of 3

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1Order Plus OutboxRecommended startPersists domain state and its outbox message in one SaveChanges transaction without publishing inside the request transaction.Coding problemMedium~25 min.NETASP.NET CoreC#Practice 2Retry Transaction UnitWraps a complete explicit transaction in the provider execution strategy and creates fresh context state for each retry attempt.Coding problemHard~35 min.NETASP.NET CoreC#Practice 3EF Query CancellationCarries the ASP.NET Core request token into a bounded EF Core query while keeping cancellation separate from business rollback guarantees.Coding problemEasy~15 min.NETASP.NET CoreC#Practice

Practice order

3 drillsOne at a time

1Order Plus OutboxUp next / Medium / ~25 min
2Retry Transaction UnitHard / ~35 min
3EF Query CancellationEasy / ~15 min