If you need to export the data, you can define an external table and export the data to it. Is it possible to override the properties of the external table using the export command?

Answer options:

A.Yes
B.No

Correct Answer: B 
The export command references the external table by name. You can’t override the external table properties with the help of the export command. For example, data in the Parquet form can’t be exported to the external table having CSV data format as CSV. 
Reference: 
To know more about exporting data to an external table, please visit the below-given link:

https://docs.microsoft.com/en-us/azure/data-explorer/kusto/management/data-export/export-data-to-an-external-table