Exam Associate-Developer-Apache-Spark-3.5 Topic 1 Question 116 Discussion

Actual exam question for Databricks's Associate-Developer-Apache-Spark-3.5 exam
Question #: 116
Topic #: 1
You have:
DataFrame A: 128 GB of transactions
DataFrame B: 1 GB user lookup table
Which strategy is correct for broadcasting?

Suggested Answer: B Vote an answer

Broadcast joins work by sending the smaller DataFrame to all executors, eliminating the shuffle of the larger DataFrame.
From Spark documentation:
"Broadcast joins are efficient when one DataFrame is small enough to fit in memory. Spark avoids shuffling the larger table." DataFrame B (1 GB) fits within the default threshold and should be broadcasted.
It eliminates the need to shuffle the large DataFrame A.
Final answer: B

by Maximilian at Aug 15, 2026, 10:28 PM

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