Exam CDP-3002 Topic 1 Question 193 Discussion

Actual exam question for Cloudera's CDP-3002 exam
Question #: 193
Topic #: 1
In a distributed environment like Apache Spark, under what conditions might a sort merge join perform more efficiently than a broadcast join?

Suggested Answer: C Vote an answer

A). sort merge join may outperform a broadcast join when both datasets are large, approximately equal in size, and already partitioned on the join key. This scenario minimizes the need for data shuffling and leverages parallel processing efficiently. While broadcast joins are excellent for joining a large dataset with a small one, their efficiency decreases as the size of the dataset being broadcasted grows, potentially leading to memory constraints.

by Ira at Aug 02, 2026, 11:02 AM

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