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
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 backup

B

Different incremental backup 

C

Cumulative backup 

D

Cumulative incremental backup

相似考题

1.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 backupB.Full backupC.Partial backupD.Differential backup

2.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.

3. You perform differential incremental level 1 backups of your database on each working day and level 0 backup on Sundays， to tape.  Which two statements are true about differential incremental backups（）A、The backup performed on Sundays contains all the blocks that have ever been used in the database.B、The backup performed on Sundays contains all the blocks that have changed since the last level 1backup. C、The backup performed on each working day contains all the blocks that have changed since the lastlevel 0 backup.D、The backup performed on Monday contains all the blocks that have changed since the level 0 backup，and every other working day contains all the blocks that have changed since the level 1 backup.

4. 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.

更多“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”相关问题

  • 第1题：

    You are managing an Oracle Database 11g database with this backup strategy：  - Every Sunday night， level 0 backup is performed.  - On Monday night and subsequent days， level 1 incremental backup is performed.  The backups are not cumulative incremental.  Which statement about Monday’s backup is true（）

    • A、The backup contains all the used blocks.
    • B、The backup contains all the used and unused blocks.
    • C、The backup contains blocks that have changed since the last level 0 backup.
    • D、The backup contains blocks that have changed since the last level 1 backup taken last week.

    正确答案:C

  • 第2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

  • 第3题：

    Examine the following command used to perform incremental level 0 backup：   RMAN> BACKUP INCREMENTAL LEVEL 0 DATABASE；   To enable the block change tracking， after the incremental level 0 backup you issued the following command：   SQL> ALTER DATABASE ENABLE BLOCK CHANGE TRACKING USING FILE ’/mydir/ rman_change_track.f’；To perform incremental level 1 cumulative backup， you issued the following command：   RMAN> BACKUP INCREMENTAL LEVEL 1 CUMULATIVE DATABASE；   Which two statements are true in the above situation？（）

    • A、 The block change tracking data will be used only from the next incremental 0 backup.
    • B、 The incremental backup will use change tracking data for accomplishing the backup.
    • C、 The incremental backup will not use change tracking data for accomplishing the backup.
    • D、 The block track file will scan all the blocks and create bitmap for all the blocks backed up in the level 0 backup.

    正确答案:A,C

  • 第4题：

    You perform differential incremental level 1 backups of your database on each working day and level 0 backupon Sundays， to tape. Which two statements are true about differential incremental backups（）

    • A、The backup performed on Sundays contains all the blocks that have ever been used in the database.
    • B、The backup performed on Sundays contains all the blocks that have changed since the last level 1 backup.
    • C、The backup performed on each working day contains all the blocks that have changed since the last level 0 backup.
    • D、The backup performed on Monday contains all the blocks that have changed since the level 0 backup， and every other working day contains all the blocks that have changed since the level 1 backup

    正确答案:A,D

  • 第5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6题：

    多选题
    Examine the following command used to perform incremental level 0 backup: RMAN> BACKUP INCREMENTAL LEVEL 0 DATABASE; To enable the block change tracking, after the incremental level 0 backup you issued the following command: SQL> ALTER DATABASE ENABLE BLOCK CHANGE TRACKING USING FILE '/mydir/ rman_change_track.f'; To perform incremental level 1 cumulative backup, you issued the following command: RMAN> BACKUP INCREMENTAL LEVEL 1 CUMULATIVE DATABASE; Which two statements are true in the above situation?（）
    A

    The block change tracking data will be used only from the next incremental 0 backup.

    B

    The incremental backup will use change tracking data for accomplishing the backup.

    C

    The incremental backup will not use change tracking data for accomplishing the backup.

    D

    The block track file will scan all the blocks and create bitmap for all the blocks backed up in the level 0 backup.


    正确答案： D,C
    解析： 暂无解析

  • 第7题：

    多选题
    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.


    正确答案： B,E
    解析： 暂无解析

  • 第8题：

    单选题
    You are managing an Oracle Database 11g database with this backup strategy：  - Every Sunday night， level 0 backup is performed.  - On Monday night and subsequent days， level 1 incremental backup is performed.  The backups are not cumulative incremental.  Which statement about Monday’s backup is true（）
    A

    The backup contains all the used blocks.

    B

    The backup contains all the used and unused blocks.

    C

    The backup contains blocks that have changed since the last level 0 backup.

    D

    The backup contains blocks that have changed since the last level 1 backup taken last week.


    正确答案： B
    解析： 暂无解析

  • 第9题：

    单选题
    Which type of backup contains only the blocks that have changed since the last level 0 incremental backup?（）
    A

    a cumulative level 1 backup

    B

    a differential level 1 backup

    C

    a full backup

    D

    a whole backup


    正确答案： D
    解析： 暂无解析

  • 第10题：

    单选题
    Which type of backup contains only the blocks that have changed since the last level 0 incremental backup？（）
    A

     a cumulative level 1 backup

    B

     a differential level 1 backup

    C

     a full backup

    D

     a whole backup


    正确答案： A
    解析： 暂无解析

  • 第11题：

    单选题
    You enable block change tracking. You issue the following command: BACKUP INCREMENTAL LEVEL 0 DATABASE; The next day, you issue the following command: BACKUP INCREMENTAL LEVEL 1 CUMULATIVE DATABASE; Which statement about the use of the change tracking file is true?（）
    A

    RMAN reads the block change tracking file only when it performs the incremental level 0 backup.

    B

    RMAN reads the block change tracking file when it performs both incremental backups.

    C

    RMAN reads the block change tracking file only when it performs the incremental level 1 backup.

    D

    RMAN does not read the block change tracking file when it performs either incremental backup.


    正确答案： C
    解析： 暂无解析

  • 第12题：

    单选题
    You enable block change tracking. You issue the following command：   BACKUP INCREMENTAL LEVEL 0 DATABASE；   The next day，you issue the following command：   BACKUP INCREMENTAL LEVEL 1 CUMULATIVE DATABASE；   Which statement about the use of the change tracking file is true？（）
    A

     RMAN reads the block change tracking file only when it performs the incremental level 0 backup.

    B

     RMAN reads the block change tracking file when it performs both incremental backups.

    C

     RMAN reads the block change tracking file only when it performs the incremental level 1 backup.

    D

     RMAN does not read the block change tracking file when it performs either incremental backup.


    正确答案： C
    解析： 暂无解析

  • 第13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14题：

    Which type of backup contains only the blocks that have changed since the last level 0 incremental backup?（）

    • A、a cumulative level 1 backup
    • B、a differential level 1 backup
    • C、a full backup
    • D、a whole backup

    正确答案:A

  • 第15题：

    You work as a database administrator for Certkiller .com. According to your backup strategy， you performed an incremental level 0 backup of your database. 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16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， acumulativeincremental level 1 tape backup is performed.  Which two statements 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 incremental backup at level 1.

    正确答案:A,B

  • 第17题：

    多选题
    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： C,A
    解析： 暂无解析

  • 第18题：

    多选题
    You perform differential incremental level 1 backups of your database on each working day and level 0 backup on Sundays， to tape.  Which two statements are true about differential incremental backups（）
    A

    The backup performed on Sundays contains all the blocks that have ever been used in the database.

    B

    The backup performed on Sundays contains all the blocks that have changed since the last level 1backup.

    C

    The backup performed on each working day contains all the blocks that have changed since the lastlevel 0 backup.

    D

    The backup performed on Monday contains all the blocks that have changed since the level 0 backup，and every other working day contains all the blocks that have changed since the level 1 backup.


    正确答案： C,D
    解析： 暂无解析

  • 第19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 backup

    B

     Different incremental backup

    C

     Cumulative backup

    D

     Cumulative incremental backup


    正确答案： A
    解析： 暂无解析

  • 第20题：

    多选题
    You perform differential incremental level 1 backups of your database on each working day and level 0 backupon Sundays， to tape. Which two statements are true about differential incremental backups（）
    A

    The backup performed on Sundays contains all the blocks that have ever been used in the database.

    B

    The backup performed on Sundays contains all the blocks that have changed since the last level 1 backup.

    C

    The backup performed on each working day contains all the blocks that have changed since the last level 0 backup.

    D

    The backup performed on Monday contains all the blocks that have changed since the level 0 backup， and every other working day contains all the blocks that have changed since the level 1 backup


    正确答案： D,B
    解析： 暂无解析

  • 第21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 backup

    B

    Different incremental backup 

    C

    Cumulative backup 

    D

    Cumulative incremental backup


    正确答案： A
    解析： 暂无解析

  • 第22题：

    多选题
    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， acumulativeincremental level 1 tape backup is performed.  Which two statements 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 incremental backup at level 1.


    正确答案： B,C
    解析： 暂无解析

  • 第23题：

    单选题
    According to your backup strategy， you performed an incremental level 0 backup of your database. 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： A
    解析： 暂无解析

  • 第24题：

    单选题
    You work as a database administrator for Certkiller .com. According to your backup strategy， you performed an incremental level 0 backup of your database. 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： C
    解析： 暂无解析

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