Databricks Certified Associate Developer for Apache Spark — Question 83

Which of the following operations returns a GroupedData object?

Answer options

• A. DataFrame.GroupBy()
• B. DataFrame.cubed()
• C. DataFrame.group()
• D. DataFrame.groupBy()
• E. DataFrame.grouping_id()

Correct answer: D

Explanation

The correct answer is D, as DataFrame.groupBy() is the method specifically designed to return a GroupedData object. The other options either do not exist or do not serve this purpose, such as DataFrame.GroupBy() which is incorrectly capitalized, and the other methods which have different functionalities.