单项选择题
You have lost all your SYSTEM tablespace datafiles (system_01.dbf and system_02.dbf) nd the database has crashed. What would be the appropriate order of operations to correct the situation?() a. Mount the database with the startup mount command. b. Take the SYSTEM datafile offline with the alter database command. c. Restore the SYSTEM_01.dbf datafile from backup media with the required archived redo logs. d. Restore all SYSTEM tablespace-related datafiles from backup media. e. Issue the recover tablespace SYSTEM command. f. Issue the recover datafile SYSTEM_01.dbf command. g. Open the database with the alter database open command. h. Open the database with the alter database open resetlogs command.
You performed the RMAN database backup having a backupset key number 231 with the KEEP FOREVER option. After some days, you want to change the status of the database backup and you issued the following command: RMAN>CHANGE BACKUPSET 231 NOKEEP; What is the implication of this command?()
多项选择题
When performing a full database disaster recovery with RMAN, in what order would you execute these steps?() a. Restore the control file from autobackups. b. Run the RMAN restore and recover command. c.Restore the database spfile from autobackups. d. Make the RMAN backup set pieces available. e. Open the database with the alter database open resetlogs command. f.Open the database with the alter database open command.
You want to use RMAN to create compressed backups. Which statement is true about the compression algorithms that RMAN can use?()
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