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Exam Certified Associate Developer for Apache Spark topic 1 question 190 discussion

Actual exam question from Databricks's Certified Associate Developer for Apache Spark
Question #: 190
Topic #: 1
[All Certified Associate Developer for Apache Spark Questions]

Which of the following code blocks returns a new DataFrame with the mean of column sqft from DataFrame storesDF in column sqftMean?

  • A. storesDF.withColumn(mean(col("sqft")).alias("sqftMean"))
  • B. storesDF.agg(col("sqft").mean().alias("sqftMean"))
  • C. storesDF.agg(mean("sqft").alias("sqftMean"))
  • D. storesDF.agg(mean(col("sqft")).alias("sqftMean"))
  • E. storesDF.withColumn("sqftMean", mean(col("sqft")))
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Suggested Answer: D 🗳️
by bp_a_user at Jan. 19, 2025, 11:50 a.m.

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bp_a_user
2 weeks, 3 days ago
Selected Answer: D
tested it: works
upvoted 1 times
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