Answer-first summary for fast verification
Answer: Two concurrent write operations that attempt to modify overlapping data within the same partition.
Delta Lake employs optimistic concurrency control to maintain data integrity and isolation. A conflict occurs specifically when two transactions attempt to write to the same partition and their modifications overlap. Because Delta Lake follows snapshot isolation principles, read operations never conflict with write operations, and writes to different partitions can typically proceed concurrently without interference.
Author: LeetQuiz Editorial Team
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In the context of Delta Lake's optimistic concurrency control (OCC), which of the following transaction scenarios will result in a conflict?
A
A standard write operation executed alongside a concurrent read operation.
B
Two concurrent write operations that attempt to modify overlapping data within the same partition.
C
Two write operations targeting distinct, non-overlapping partitions.
D
A read operation performed simultaneously with a time travel query.