DatabricksDatabricks
DATABRICKS-CERTIFIED-ASSOCIATE-DEVELOPER-FOR-APACHE-SPARK · Question #157
DATABRICKS-CERTIFIED-ASSOCIATE-DEVELOPER-FOR-APACHE-SPARK Question #157: Real Exam Question with Answer & Explanation
The correct answer is D: The describe() operation does not accept a Column object as an argument - the column name. See the full explanation below for the reasoning.
Working with DataFrames
Question
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 "))
Options
- AThe describe() operation doesn't compute summary statistics for a single column - the summary()
- BThe column sqft should be subsetted from DataFrame storesDF prior to computing summary
- CThe describe() operation does not accept a Column object as an argument outside of a list - the list
- DThe describe() operation does not accept a Column object as an argument - the column name
- EThe describe() operation doesn't compute summary statistics for numeric columns - the sumwary()
Topics
#PySpark DataFrame API#DataFrame Transformations#Summary Statistics#Column References
Community Discussion
No community discussion yet for this question.