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Exam Certified Associate Developer for Apache Spark topic 1 question 157 discussion

Actual exam question from Databricks's Certified Associate Developer for Apache Spark
Question #: 157
Topic #: 1
[All Certified Associate Developer for Apache Spark Questions]

The code block shown below contains an error. The code block is intended to return a collection of summary statistics for column sqft in Data Frame storesDF. Identify the error.

Code block:

storesDF.describes(col("sgft "))

  • A. The describe() operation doesn't compute summary statistics for a single column — the summary() operation should be used instead.
  • B. The column sqft should be subsetted from DataFrame storesDF prior to computing summary statistics on it alone.
  • C. The describe() operation does not accept a Column object as an argument outside of a list — the list [col("sqft")] should be specified instead.
  • D. The describe() operation does not accept a Column object as an argument — the column name string "sqft" should be specified instead.
  • E. The describe() operation doesn't compute summary statistics for numeric columns — the sumwary() operation should be used instead.
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Suggested Answer: D 🗳️
by Ahlo at Feb. 27, 2024, 5:39 p.m.

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Ahlo
9 months ago
Answer D correct https://spark.apache.org/docs/latest/api/python/reference/pyspark.sql/api/pyspark.sql.DataFrame.describe.html
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