Which view provides information on the backup status of the datafiles in the database？（）  

单项选择题What will be the result of the following configuration？（）   Log_archive_dest_1=location=c： oracle arch mydb Log_archive_dest_2=location=z： oracle arch mydb

A. An error will occur during database startup because the second parameter is not valid.
B. An error will occur during database startup since you are trying to create archived redo logs in two different locations.
C. Archived redo logs will be created in two different locations by the ARCH process.
D. Archived redo logs will be created in two different locations by the LGWR process.
E. Neither parameter setting is valid， so the database will not start up.

单项选择题ArchivedredologscanbecopiedtomorethanonedestinationbyOracle.（）

A. True
B. False

单项选择题Whichisnotavalidwayofbackingupacontrolfile？（）

A. Backing up the control file to trace
B. Copying the existing control file of the database to the backup location during a hot backup 
C. Copying the existing control file of the database to the backup location during a cold backup
D. Creating a backup control file
E. Using the create controlfile command

单项选择题EverySundaytheUnixsystemadministratorhasajobthatexecutesafullbackupoftheentireUnixsystemyourdatabaseison.Isthisbackupusableforbackupandrecoveryofyourdatabase？（）

A. Yes， if the database is in ARCHIVELOG mode
B. Yes， if the database is in NOARCHIVELOG mode
C. No， the backup is not usable in any way
D. Only if the ENABLE_ONLINE_BACKUP parameter is set to TRUE

单项选择题WhichofthefollowingisavalidwayofputtingatablespacenamedDAVE_TBSintohotbackupmode？（）

A. alter tablespace DAVE_TBS backup mode
B. alter tablespace DAVE_TBS start backup
C. alter tablespace DAVE_TBS begin backup
D. alter tablespace DAVE_TBS backup begin
E. alter tablespace DAVE_TBS backup