フリー問題

問題文

After a synchronization with an external data catalog completes, the schemas that appear in the database behave unusually. Which description is correct?

選択肢

1. They are created by the synchronization as ordinary users with passwords, so applications can connect to them directly with those credentials.
2. They are created and dropped by the synchronization itself, and they cannot be altered by local users because they are protected.
3. They are created by the synchronization and readable by every database user, so no further grants are needed.
4. They are created by the synchronization and handed over to the administrator, who then owns them and can add objects to them while the synchronization keeps running.