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You have a Microsoft Azure Data Lake Analytics service. You need to store a list of multiple-character string values in a single column and to use a CROSS APPLY EXPLODE expression to output the values. Which type of data should you use in a U-SQL query?
Correct Answer: B
Explanation/Reference: Explanation: The EXPLODE rowset expression accepts an expression or value of either type SQL.ARRAY, SQL.MAP or IEnumerable and unpacks (explodes) the values into a rowset. If EXPLODE is applied on an instance of SQL.ARRAY <T>, the resulting rowset contains a single column of type T where each item in the array is placed into its own row. If the array value was empty or null, then the resulting rowset is empty. Incorrect Answers: D: If EXPLODE is applied on an instance of SQL.MAP <K,V>, the resulting rowset contains two columns of type K and V respectively where each key-value pair in the map is placed into its own row. If the map value was empty or null, then the resulting rowset is empty. References: https://msdn.microsoft.com/en-us/azure/data-lake-analytics/u-sql/explode-u-sql
