CMS专题
单选题Which type of backup backs up only data blocks modified since the most recent backup at the same level or lower?（）A Differential incremental backupB Different incremental backup C Cumulative backup D Cumulative incremental backup
题目
Differential incremental backup
Different incremental backup
Cumulative backup
Cumulative incremental backup
参考答案和解析
相似问题和答案
第1题：
A. Snapshot
B. Incremental
C. Copy
D. Differential
第2题：
Which of the following archiving methods only backs up data that has changed since the previous backup？（）
- A、Differential
- B、Copy
- C、Incremental
- D、Snapshot
正确答案:C
第3题：
You issued the following commands to configure setting in RMAN;Then you issued the following command to take the backup:RMAN> BACKUP DATABASE PLUS ARCHIVELOG;Which statement is true about the execution of the above command?（）
A. The backup will terminate because the FORMAT clause was not configured for the channel
B. It backs up two copies of data files to tape and disk, and two copies of archived log file on tape
C. It backs up the data files and archived log files to disk, making two copies of each data file and archived log file
D. It backs up the data files and archived log files to tape, making two copies of each data file and archived log file
第4题：
Which type of backup backs up only data blocks modified since the most recent backup at the same level or lower？（）
- A、 Differential incremental backup
- B、 Different incremental backup
- C、 Cumulative backup
- D、 Cumulative incremental backup
正确答案:A
第5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6题：
You have enabled backup optimization for the RMAN environment.Identify two criteria on which RMAN will skip the file, if it has already been backed up.（）
- A、The data file backup is done with multiple channels
- B、The data files is in the read-write mode after being backed up in the read only mode
- C、The backup was taken after the data files was taken offline-normal or is in the read only mode
- D、The data file backup complies with the back retention policy and the backup duplexing feature
正确答案:C,D
第7题：
Which of the following archiving methods only backs up data that has changed since the previous full backup?（）
- A、Snapshot
- B、Incremental
- C、Copy
- D、Differential
正确答案:D
第8题：
Which type of the backup process backs up files that have been modified since the last time all data was backed up?(72 )
A.Incremental backup
B.Full backup
C.Partial backup
D.Differential backup
第9题：
According to your backup strategy， you performed an incremental level 0 backup of yourdatabase. Which statement regarding this backup is true？（）
- A、The backup is similar to image copy.
- B、The backup contains all used data blocks.
- C、The backup contains only unused data blocks.
- D、The backup contains all data blocks changed since the last incremental level 1 backup.
正确答案:B
第10题：
You are managing an Oracle Database 11g database with the following backup strategy：1） On Sunday， an incremental level 0 tape backup is performed.2） Monday through Saturday， a cumulative incremental level 1 tape backup is performed. Which twostatements are true regarding the backups performed（）
- A、The backup performed in step 1 backs up all blocks that have ever been in use in the database.
- B、The backup performed in step 2 copies all the blocks changed since the most recent level 0 backup.
- C、The backup performed in step 1 backs up all the blocks changed since the most recent level 1 backup.
- D、The backup performed in step 2 backs up all blocks that have changed since the most recent incrementalbackup at level 1
正确答案:A,B