While validating a silver table, an engineer wants a one-call profile of the numeric column amount: count, mean, standard deviation, min, max, and the approximate 25th, 50th, and 75th percentiles — without writing any custom aggregation code. Which DataFrame method returns all of those statistics?
Reveal answer
Correct answer: df.summary()
Reference: https://docs.databricks.com/aws/en/pyspark/reference/functions
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02 — The Myelin Layer · Canonical Discussion
Where the exam tries to trick you — and how those who passed solved it.
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Official Answer (D): df.summary()
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