多项选择题 Which two statements regarding the Flashback Table feature are correct?（）

单项选择题 You issued the following command on the temporary tablespace LMTEMP in your database: SQL>ALTER TABLESPACE lmtemp SHRINK SPACE KEEP 20M; Which requirement must be fulfilled for this command to succeed?（）

单项选择题 View the Exhibit to examine the error during the database startup.You open an RMAN session for the database instance. To repair the failure, you executed the following as the first command in the RMAN session: RMAN> REPAIR FAILURE; Which statement describes the consequence of the command?（）