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Exam Certified Associate Developer for Apache Spark topic 1 question 62 discussion

Actual exam question from Databricks's Certified Associate Developer for Apache Spark
Question #: 62
Topic #: 1
[All Certified Associate Developer for Apache Spark Questions]

Which of the following Spark properties is used to configure the maximum size of an automatically broadcasted DataFrame when performing a join?

  • A. spark.sql.broadcastTimeout
  • B. spark.sql.autoBroadcastJoinThreshold
  • C. spark.sql.shuffle.partitions
  • D. spark.sql.inMemoryColumnarStorage.batchSize
  • E. spark.sql.adaptive.skewedJoin.enabled
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Suggested Answer: B 🗳️
by thanab at Sept. 16, 2023, 2:43 a.m.

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thanab
7 months, 2 weeks ago
Selected Answer: B
The correct answer is B. spark.sql.autoBroadcastJoinThreshold. This property in Apache Spark is used to configure the maximum size (in bytes) of a table that will be broadcast to all worker nodes when performing a join. If the size of the table is below this threshold, it will be broadcasted, which can significantly speed up join operations.
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