单项选择题
A. Provide a password for the encryption
B. Set up an Oracle wallet for the encryption
C. No setup is required as it is a default encryption method
D. Both Oracle wallet and password must be set up for the encryption
多项选择题 For which two database objects can the VERSIONS clause of the Flashback Versions Query be used?（）(Choose two.)
单项选择题 After you have restored and recovered a database to a new host by using a previously performed Recovery Manager (RMAN) backup, which is the best option you would consider for the new database?（）
多项选择题 User SCOTT wants to back out the transactions on the REGIONS table in his schema. As a DBA, whichcommands must you execute to enable SCOTT to flash back the transactions? （）(Choose four.)