单项选择题
A. A different procedure is required to restore a database from compressed backups
B. The AS COMPRESSED clause of the BACKUP command provided by RMAN is used to create compressed backup sets and image copies.
C. Using this command to create backups minimizes the bandwidth consumed
D. Using this command to create backups improves the performance of the backup process
单项选择题 Whichdependentobjectwillgetinvalidatedevenifitisnotaffectedbythetableedefinition？（）
多项选择题 YouinstalledOracleDatabase11gafresh.Whichstatementsaretrueregardingthedefaultauditsettingsinthisdatabase？（）
多项选择题 You want to take the backup of the USERS tablespace. It has a single data file of 900 MB. You have tape drives of 300 MB each. The SBT channel is configured for the RMAN. To accomplish the backup， you issued the following RMAN command： RMAN> BACKUP SECTION SIZE 300M TABLESPACE users； Which two statements are true regarding the execution of the above command？（）