Databricks Certified Associate Developer for Apache Spark — Question 30

Which of the following code blocks returns a collection of summary statistics for all columns in
DataFrame storesDF?

Answer options

• A. storesDF.summary("mean")
• B. storesDF.describe(all = True)
• C. storesDF.describe("all")
• D. storesDF.summary("all")
• E. storesDF.describe()

Correct answer: E

Explanation

The correct answer is E, as the describe() function on a DataFrame returns summary statistics for all numeric columns by default. The other options either specify parameters that limit the output or are incorrectly formatted, leading to incomplete results.