Question 630
A Delta Lakehouse notebook fails while multiple writers update a shared table. The current environment exhibits the following problem: a streaming writer and batch writer both update the same keys unsafely. What is the most defensible next action?
Explanation
Correct Answer
Coordinate write boundaries or separate staging and merge phases. Concurrent writers need isolation compatible with their data operations.
Incorrect Answers
A schema overwrite removes a column still required by downstream readers. Storage schema evolution is an application contract change.
A notebook reads a Delta table with missing transaction-log metadata. Delta readers depend on consistent transaction metadata.
Two concurrent MERGE operations conflict on overlapping partitions. Optimistic concurrency rejects incompatible overlapping updates.