DATABRICKS-CERTIFIED-ASSOCIATE-DEVELOPER-FOR-APACHE-SPARK · Question #78
DATABRICKS-CERTIFIED-ASSOCIATE-DEVELOPER-FOR-APACHE-SPARK Question #78: 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 the Scala UDF assessPerformanceUDF() and apply it to the integer column customers1t1sfaction in Data Frame storesDF. Identify the error. Code block:
Options
- AThe input type of customerSatisfaction is not specified in the udf() operation.
- BThe return type of assessPerformanceUDF() must be specified.
- CThe withColumn() operation is not appropriate here - UDFs should be applied by iterating over
- DThe assessPerformanceUDF() must first be defined as a Scala function and then converted to a
- EUDFs can only be applied via SQL and not through the Data Frame API.
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