Câu 42: Databricks Certified Associate Developer for Apache Spark

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")

1. A. The larger DataFrame employeesDF is being broadcasted rather than the smaller DataFrame storesDF. — đáp án hiện tại
2. B. There is never a need to call the broadcast() operation in Apache Spark 3.
3. C. The entire line of code should be wrapped in broadcast() rather than just DataFrame employeesDF.
4. D. The broadcast() operation will only perform a broadcast join if the Spark property spark.sql.autoBroadcastJoinThreshold is manually set.
5. E. Only one of the DataFrames is being broadcasted rather than both of the DataFrames.