Coding (Platform)
express + react · Hard · offline sync
A browser and API disagree at the optimistic workflow journal boundary. A board supports several rapid card moves. When one request fails, the current implementation restores the entire old board and erases later confirmed moves.
Repair the shared browser-to-service contract. Reconcile move intents independently so failure restores only the affected intent while later confirmed order remains.
Optimistic workflow journal is a coding (platform) interview exercise that trains prompt interpretation, explicit assumptions, a concrete response, and a clear explanation of tradeoffs. The catalog marks it as hard difficulty. It focuses on State Modeling, Regression Testing, Technical Reasoning. The signed-in workspace provides the tools for the round and evaluates the attempt against task-specific criteria. Reference solutions, hidden checks, evaluator instructions, and candidate work remain private.