DATABRICKS-CERTIFIED-ASSOCIATE-DEVELOPER-FOR-APACHE-SPARK · Question #181
DATABRICKS-CERTIFIED-ASSOCIATE-DEVELOPER-FOR-APACHE-SPARK Question #181: 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 left join between DataFrame storesDF and DataFrame employeesDF on column storeId. Identify the error. Code block: storesDF.join(employeesDF, "storeId")
Options
- AThe key column storeId needs to be in a list like ["storeId"].
- BThe key column storeId needs to be wrapped in the col() operation.
- CThere is no DataFrame.join() operation - DataFrame.merge() should be used instead.
- DThe default argument to the how parameter is "inner" - an additional argument of "1eft" must be
- EThe key column storeId needs to be specified in an expression of both DataFrame columns like
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