hard20 pts · first answer countslakehouseconcurrency

Two writers, one lakehouse table

Two jobs write to the same Iceberg or Delta table at the same time, and both rewrite files in the same partition. How do these table formats keep the table consistent?

A.They lock the whole storage bucket until each job endsB.Optimistic concurrency: each writer commits a new snapshot atomically, and if a conflicting commit happened first, the loser must retry or failC.The last writer silently overwrites the other writer's dataD.They merge both writes row by row automatically, whatever the conflict

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Two writers, one lakehouse table

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