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Exam Certified Associate Developer for Apache Spark All Questions

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Exam Certified Associate Developer for Apache Spark topic 1 question 81 discussion

Actual exam question from Databricks's Certified Associate Developer for Apache Spark
Question #: 81
Topic #: 1
[All Certified Associate Developer for Apache Spark Questions]

Which of the following code blocks applies the function assessPerformance() to each row of DataFrame storesDF?

  • A. storesDF.collect.foreach(assessPerformance(row))
  • B. storesDF.collect().apply(assessPerformance)
  • C. storesDF.collect.apply(row => assessPerformance(row))
  • D. storesDF.collect.map(assessPerformance(row))
  • E. storesDF.collect.foreach(row => assessPerformance(row))
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Suggested Answer: E 🗳️
by azure_bimonster at Feb. 9, 2024, 2:58 p.m.

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azure_bimonster
9 months, 3 weeks ago
Selected Answer: E
Short explanation below: - collect() retrieves all the rows of the DataFrame and returns them as an array. - foreach() applies the specified function to each element of the array. So, in this case, foreach(row => assessPerformance(row)) applies the function assessPerformance() to each row of the DataFrame storesDF.
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