DATABRICKS-CERTIFIED-ASSOCIATE-DEVELOPER-FOR-APACHE-SPARK · Question #32
DATABRICKS-CERTIFIED-ASSOCIATE-DEVELOPER-FOR-APACHE-SPARK Question #32: Real Exam Question with Answer & Explanation
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Question
The code block shown below contains an error. The code block intended to return a new DataFrame that is the result of an inner join between DataFrame storesDF and DataFrame employeesDF on column storeId. Identify the error. Code block: StoresDF.join(employeesDF, "inner", "storeID")
Options
- AThe key column storeID needs to be wrapped in the col() operation.
- BThe key column storeID needs to be in a list like ["storeID"].
- CThe key column storeID needs to be specified in an expression of both DataFrame columns like
- DThere is no DataFrame.join() operation - DataFrame.merge() should be used instead.
- EThe column key is the second parameter to join() and the type of join in the third parameter to
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