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C# and .NET Developer Assessment: The Deadlock Nobody Caught in Review

.NET gives you so much for free that the mistakes hide inside the framework rather than in the code under review. Here are four tasks on a running service, a deadlock under load, a captured dependency, a query that drags the whole table into memory, and a background worker that died quietly.

Node.js Developer Assessment: The Bug That Only Shows Up at 3am

Node interviews ask candidates to recite the event loop, then production fails in ways no recitation covers. Here are four tasks on a running service, an unhandled rejection, a heap that only climbs, a retry storm and a blocked event loop, with what separates a strong answer from a plausible one.