DATABRICKS-CERTIFIED-ASSOCIATE-DEVELOPER-FOR-APACHE-SPARK · Question #35
DATABRICKS-CERTIFIED-ASSOCIATE-DEVELOPER-FOR-APACHE-SPARK Question #35: Real Exam Question with Answer & Explanation
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Question
The below code block contains a logical error resulting in inefficiency. The code block is intended to efficiently perform a broadcast join of DataFrame storesDF and the much larger DataFrame employeesDF using key column storeId. Identify the logical error. Code block: storesDF.join(broadcast(employeesDF), "storeId")
Options
- AThe larger DataFrame employeesDF is being broadcasted rather than the smaller DataFrame
- BThere is never a need to call the broadcast() operation in Apache Spark 3.
- CThe entire line of code should be wrapped in broadcast() rather than just DataFrame
- DThe broadcast() operation will only perform a broadcast join if the Spark property
- EOnly one of the DataFrames is being broadcasted rather than both of the DataFrames.
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