多项选择题
A. You must configure block change tracking file
B. You must have first level 1 backups for RMAN to restore blocks
C. You must ensure that the SALES database is mounted or open
D. You must have full or level 0 backups for RMAN to restore blocks
E. You must take the tools01.dbf data file offline before you start a block media recovery
多项选择题 Examine the following command that is used to duplicate a database on the same host: Which two statements describe the effect after the database is duplicated successfully? （）
单项选择题 View the Exhibit and examine the steps that you executed to create a database resource plan. Subsequently, you execute the following procedure which results in an error: SQL> EXECUTE dbms_resources_manager.validate_pending_area ( ); What could be the reason?（）
多项选择题 You plan to execute the following command to perform a Flashback Database operation in your database: SQL> FLASHBACK DATABASE TO TIMESTAMP (SYSDATE -5/24); Which two statements are true about this?（）