Databricks Certified Associate Developer for Apache Spark — Question 79

Which of the following operations can be used to return a new DataFrame from DataFrame storesDF without columns that are specified by name?

Answer options

• A. storesDF.filter()
• B. storesDF.select()
• C. storesDF.drop()
• D. storesDF.subset()
• E. storesDF.dropColumn()

Correct answer: C

Explanation

The correct answer is C, storesDF.drop(), as it effectively removes specified columns from the DataFrame. Options A and B do not provide functionality for dropping columns; A filters rows while B selects specific columns. Option D is not a valid operation in this context, and E is not a standard method for dropping columns in DataFrames.