HOTSPOT
You have a database named DB1. You create a Microsoft SQL Server Integration Services (SSIS) package that incrementally imports data from a table named Customers. The package uses an OLE DB data source for connections to DB1. The package defines the following variables.
To support incremental data loading, you create a table by running the following Transact-SQL segment:
You need to create a DML statements that updates the LastKeyByTable table.
How should you complete the Transact-SQL statement? To answer, select the appropriate Transact-SQL segments in the dialog box in the answer area.
Hot Area:
Answer: 
Answer should be lastkey=? where tablename=? as In question statement its mentioned that “OLE DB data source for connections”. For oledb connections , we should use ? instead of @parametername.
Reference link : https://docs.microsoft.com/en-us/sql/integration-services/map-query-parameters-to-variables-in-an-execute-sql-task?view=sql-server-2014
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