DATABRICKS-CERTIFIED-ASSOCIATE-DEVELOPER-FOR-APACHE-SPARK · Question #37
DATABRICKS-CERTIFIED-ASSOCIATE-DEVELOPER-FOR-APACHE-SPARK Question #37: Real Exam Question with Answer & Explanation
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Question
The code block shown below contains an error. The code block is intended to return a new DataFrame that is the result of a position-wise union between DataFrame storesDF and DataFrame acquiredStoresDF. Identify the error. Code block: storesDF.unionByName(acquiredStoresDF)
Options
- AThere is no DataFrame.unionByName() operation - the concat() operation should be used instead
- BThere are no key columns specified - similar column names should be the second argument.
- CThe DataFrame.unionByName() operation does not union DataFrames based on column position
- DThe unionByName() operation is a standalone operation rather than a method of DataFrame - it
- EThere are no column positions specified - the desired column positions should be the second
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