Databricks Certified Associate Developer for Apache Spark — Question 21

Which of the following operations can be used to create a DataFrame with a subset of columns from DataFrame storesDF that are specified by name?

Answer options

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

Correct answer: B

Explanation

The correct answer is B, as the select() method is specifically designed to create a DataFrame with only the specified columns. The other options either do not exist or do not serve the purpose of selecting specific columns from a DataFrame.