1Z0-053
单选题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； Wh
题目
The backup is deleted.
The backup is marked unavailable.
The backup overrides the backup retention policy.
the backup becomes eligible for deletion according to the existing retention policy.
相似问题和答案
第1题：
You performed an incremental level 0 backup of a database:RMAN > BACKUP INCREMENTAL LEVEL 0 DATABASE;To enable block change tracking after the incremental level 0 backup, you issued this command:SQL > ALTER DATABASE ENABLE BLOCK CHANGE TRACKING USING FILE ‘ /mydir/rman_change_track.f’;To perform an incremental level 1 cumulative backup, you issued this command:RMAN> BACKUP INCREMENTAL LEVEL 1 CUMULATIVE DATABASE;Which three statements are true?（）
A. Backup change tracking will sometimes reduce I/O performed during cumulative incremental backups.
B. The change tracking file must always be backed up when you perform a full database backup.
C. Block change tracking will always reduce I/O performed during cumulative incremental backups.
D. More than one database block may be read by an incremental backup for a change made to a single block.
E. The incremental level 1 backup that immediately follows the enabling of block change tracking will not read the change tracking file to discover changed blocks.
第2题：
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?（）
- A、The backup is deleted.
- B、The backup is marked unavailable.
- C、The backup overrides the backup retention policy.
- D、the backup becomes eligible for deletion according to the existing retention policy
正确答案:D
第3题：
A. The backup as copy can only be taken to disk
B. The backup as copy can only be taken to tape
C. Backup can be performed only when the instance is shutdown
D. Backup will constitute all used and unused blocks in the database
第4题：
You are maintaining the SALES database of a company. You have never backed up the USERS tablespace that is currently offline. On Sunday， you issued the following commands： CONFIGURE DEFAULT DEVICE TYPE TO sbt； CONFIGURE BACKUP OPTIMIZATION ON； CONFIGURE RETENTION POLICY TO REDUNDANCY 3； From Monday to Saturday， you performed the following actions： Day Action Monday BACKUP DATABASE Tuesday BACKUP DATABASE Wednesday BACKUP DATABASE Thursday BACKUP DATABASE Friday BACKUP DATABASE Saturday BACKUP DATABASE How many times will the backup of the USERS tablespace be performed？（）
- A、 The backup will not be performed at all.
- B、 three times
- C、 four times
- D、 six times
正确答案:C
第5题：
Your database runs in NOARCHIVELOG mode， and is backed up every night using RMAN scripts. However， last night your assistant DBA performed a manual operating system backup， instead of running the scripts. Today your database crashed and you now want to use the backups from last night. What do you need todo？（）
- A、You need to perform the restore and recover operations manually, because the backup was made manually.
- B、First you need to resynchronize the catalog with the control file, and then you can use RMAN to recover the database.
- C、First you need to add the backup to the catalog using the CATALOG command, and then you can use RMAN to recover the database.
- D、You can just use RMAN and recover the database, because RMAN automatically updates the catalog with the backup information.
正确答案:C
第6题：
You use a recovery catalog for maintaining your database backups.You execute the following command:$rman TARGET / CATALOG rman / cat@catdbRMAN >BACKUP VALIDATE DATABASE ARCHIVELOG ALL;Which two statements are true?（）
A. Corrupted blocks, if any, are repaired.
B. Checks are performed for physical corruptions.
C. Checks are performed for logical corruptions.
D. Checks are performed to confirm whether all database files exist in correct locations
E. Backup sets containing both data files and archive logs are created.
第7题：
You work as a database administrator for Supportcenter.cn. You are using Recovery Manager （RMAN） to perform backups in your databases. Which four backup operations can be performed using RMAN？（）
- A、A backup of the target database when it is mounted
- B、A backup of online redo log files when the database is open
- C、A backup of only used data blocks in the file beingbeingbackup up
- D、A backup of online， read/write data files when the database is open
- E、A backup of only those data blocks that have changed since a previous backup
- F、A backup of online， read/write data files when the database is in the NOMOUNT state.
正确答案:A,C,D,E
第8题：
A. The backup as copy can only be taken to disk
B. The backup as copy can only be taken to tape
C. Backup can be performed only when the instance is shutdown
D. Backup will constitute all used and unused blocks in the database
第9题：
You use a recovery catalog for maintaining your database backups.You execute the following command:$rman TARGET / CATALOG rman / cat@catdbRMAN > BACKUP VALIDATE DATABASE ARCHIVELOG ALL;Which two statements are true?（）
- A、Corrupted blocks, if any, are repaired.
- B、Checks are performed for physical corruptions.
- C、Checks are performed for logical corruptions.
- D、Checks are performed to confirm whether all database files exist in correct locations
- E、Backup sets containing both data files and archive logs are created.
正确答案:B,D
第10题：
It is a holiday and no transactions are being performed on the database. You took a consistent backup of your database without using Recovery Manager （RMAN）. How would you make use of this consistent backup in RMAN？（）
- A、cannot be used in RMAN
- B、by starting up the database again
- C、by using the CATALOG command of RMAN
- D、by using the RECOVER CATALOG command in RMAN
- E、by re-creating the target control file to rebuild the RMAN repository
正确答案:C