Câu 60: Databricks Certified Data Engineer Professional

Which statement describes the correct use of pyspark.sql.functions.broadcast?

1. A. It marks a column as having low enough cardinality to properly map distinct values to available partitions, allowing a broadcast join.
2. B. It marks a column as small enough to store in memory on all executors, allowing a broadcast join.
3. C. It caches a copy of the indicated table on attached storage volumes for all active clusters within a Databricks workspace.
4. D. It marks a DataFrame as small enough to store in memory on all executors, allowing a broadcast join. — đáp án hiện tại
5. E. It caches a copy of the indicated table on all nodes in the cluster for use in all future queries during the cluster lifetime.