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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 156 discussion

Actual exam question from Databricks's Certified Associate Developer for Apache Spark
Question #: 156
Topic #: 1
[All Certified Associate Developer for Apache Spark Questions]

Which of the following code blocks fails to return the number of rows in DataFrame storesDF for each distinct combination of values in column division and column storeCategory?

  • A. storesDF.groupBy((col("division"), col("storeCategory")]).count()
  • B. storesDF.groupBy("division").groupBy("storeCategory").count()
  • C. storesDF.groupBy(["division", "storeCategory"]).count()
  • D. storesDF.groupBy("division", "storeCategory").count()
  • E. storesDF.groupBy(col("division“), col("storeCategory")).count()
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Suggested Answer: B 🗳️
by YiJiaSu at Feb. 18, 2024, 12:29 p.m.

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SaiPavan10
7 months, 3 weeks ago
Selected Answer: B
B is the right choice. I tested with my dataframe option B threw this error AttributeError: 'GroupedData' object has no attribute 'groupBy'
upvoted 1 times
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YiJiaSu
9 months, 1 week ago
Selected Answer: D
D is correct !
upvoted 1 times
Ahlo
9 months ago
it is possible to run in pyspark - storesDF.groupBy("division", "storeCategory").count() Correct answer is B
upvoted 2 times
...
...

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