DATABRICKS-CERTIFIED-ASSOCIATE-DEVELOPER-FOR-APACHE-SPARK · Question #106
DATABRICKS-CERTIFIED-ASSOCIATE-DEVELOPER-FOR-APACHE-SPARK Question #106: 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 return a new DataFrame from DataFrame storesDF where column storeId is of the type string. Identify the error. Code block: storesDF.withColumn("storeId", cast(col("storeId"), StringType()))
Options
- ACalls to withColumn() cannot create a new column of the same name on which it is operating.
- BDataFrame columns cannot be converted to a new type inside of a call to withColumn().
- CThe call to StringType should not be followed by parentheses.
- DThe column name storeId inside the col() operation should not be quoted.
- EThe cast() operation is a method in the Column class rather than a standalone function.
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