DATABRICKS-CERTIFIED-ASSOCIATE-DEVELOPER-FOR-APACHE-SPARK · Question #56
DATABRICKS-CERTIFIED-ASSOCIATE-DEVELOPER-FOR-APACHE-SPARK Question #56: Real Exam Question with Answer & Explanation
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Question
Which of the following code blocks returns a DataFrame where column divisionDistinct is the approximate number of distinct values in column division from DataFrame storesDF?
Options
- AstoresDF.withColumn("divisionDistinct", approx_count_distinct(col("division")))
- BstoresDF.agg(col("division").approx_count_distinct("divisionDistinct"))
- CstoresDF.agg(approx_count_distinct(col("division")).alias("divisionDistinct"))
- DstoresDF.withColumn("divisionDistinct", col("division").approx_count_distinct())
- EstoresDF.agg(col("division").approx_count_distinct().alias("divisionDistinct"))
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