In Which of the following cases, Virtual DataPort actually creates an index in the database?

Data virtualization supports many critical use cases within an organization, principally which one could not be the key solutions enabled by data virtualization as of today?

John, Denodo Sr. Developer used JDBC connection to create Base views, but later identified that base view is degrading over time. He analyzed further & found that direct SQL query on the Source provides much better consistent performance, so he recreated base views from SQL queries. As Best Practices, John follows the belowlist of consideration while creating base views from SQL queries.I.SQL query has to use the SQL dialect of that database, not the SQL dialect of Virtual DataPort.II. Remove single line comments from the SQL query.III. If the SQL query invokes a PL/SQL function using an interpolation variable, you need to assign an alias to the return value.IV. If the SQL query is a SELECT query, after creating the view, John recommends setting to “yes” the “Delegate SQL sentence as subquery” property of the view.V. SQL query should not have interpolation variables, otherwise SQL query would fail.Mark the Correct Statements from the below list?

Which one of the below is not the predefined data types included in the Virtual DataPort catalog?

Authentication methods Uses the Credentials of the Web Service for Web Services Authentication?