DATABRICKS-CERTIFIED-ASSOCIATE-DEVELOPER-FOR-APACHE-SPARK · Question #23
DATABRICKS-CERTIFIED-ASSOCIATE-DEVELOPER-FOR-APACHE-SPARK Question #23: 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 create a Python UDF assessPerformanceUDF() using the integer-returning Python function assessPerformance() and apply it to column customerSatisfaction in DataFrame storesDF. Identify the error. Code block: assessPerformanceUDF - udf(assessPerformance) storesDF.withColumn("result", assessPerformanceUDF(col("customerSatisfaction")))
Options
- AThe assessPerformance() operation is not properly registered as a UDF.
- BThe withColumn() operation is not appropriate here - UDFs should be applied by iterating over
- CUDFs can only be applied vie SQL and not through the DataFrame API.
- DThe return type of the assessPerformanceUDF() is not specified in the udf() operation.
- EThe assessPerformance() operation should be used on column customerSatisfaction rather than
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