差分备份（Differential Backup）

题目

差分备份（Differential Backup）

相似考题

1.在SQL Server 2000中，要对数据库GoodsDB进行一次差异备份，将其备份到设备Backup 1上(该设备已建立好)，并要求该次备份操作清除Backupl中己有的备份内容。下列能实现该备份要求的语句是A．BACKUP DATABASE GoodsDB TO Backupl DIFFERENTIAL,WITH NOINITB．BACKUP DATABASE GoodsDB TO Backupl WITH DIFFERENTIAL,NOINITC．BACKUP DATABASE GoodsDB TO Backupl DIFFERENTIAL,WITHINITD．BACKUP DATABA息E GoodsDB TO Backupl WITH DIFFERENTIAL,INIT

2.● 还原速度最快的数据备份策略是 （14） 。（14）A．完全备份+增量备份+差分备份B．差分备份+增量备份C．完全备份+增量备份D．完全备份+差分备份

3.A company utilizes the GFS backup standard. Which of the following describes this backup method?()A. Greatest, Final, SequentialB. Full, Partial, IncrementalC. Monthly, Weekly, DailyD. Full, Differential, Incremental

4.还原速度最快的数据备份策略是()。A.完全备份+增量备份+差分备份B.差分备份+增量备份C.完全备份+增量备份D.完全备份+差分备份

更多“差分备份（Differential Backup）”相关问题

  • 第1题：

    Which of the following is the FINAL step in the backup process?()

    A. Load differential tape

    B. Verify backup

    C. Load new tapes

    D. Perform a full backup


    参考答案：B

  • 第2题：

    Backup命令的功能是用于完成UNIX／Linux文件的备份，下面说法不正确的是（）。

    • A、Backup—c命令用于进行完整备份
    • B、Backup—p命令用于进行增量备份
    • C、Backup—f命令备份由file指定的文件
    • D、Backup—d命令当备份设备为磁带时使用此选项

    正确答案:D

  • 第3题：

    Which of the following is the FINAL step in the backup process？（）

    • A、 Load differential tape
    • B、 Verify backup
    • C、 Load new tapes
    • D、 Perform a full backup

    正确答案:B

  • 第4题：

    Due to operational commitments， a system has a very short backup window during the week， but is not used from Saturday morning through Sunday at Midnight.  Which of the following minimizes backup and recovery time， while providing complete data restore coverage （）

    • A、Full backups every month， daily incremental backups
    • B、Full backups every month， daily differential backups
    • C、Full backup Saturday night， incremental backups the rest of the week
    • D、Full backup Saturday night， differential backups the rest of the week

    正确答案:C

  • 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：

    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7题：

    You have a file server named Server1 that runs Windows Server 2003 Service Pack 2 (SP2). You need to implement a backup schedule on Server1 to meet the following requirements: ·Everyday, back up all files and folders to disk. ·Every Friday, back up all files and folders to tape. ·Every Sunday, Tuesday, and Thursday, back up only the files and folders that have changed since the previous Friday’s backup to tape. Which backup jobs should you create? （）

    • A、·a normal backup to disk everyday ·a normal backup to tape on Friday ·a differential backup to tape on Sunday, Tuesday, and Thursday
    • B、·a normal backup to disk everyday ·a normal backup to tape on Friday ·an incremental backup to tape on Sunday, Tuesday, and Thursday
    • C、·a copy backup to disk everyday ·a normal backup to tape on Friday ·a differential backup to tape on Sunday, Tuesday and, Thursday
    • D、·a copy backup to disk everyday ·a normal backup to tape on Friday ·an incremental backup to tape on Sunday, Tuesday and, Thursday

    正确答案:C

  • 第8题：

    You have a computer that runs Windows XP Professional. Normal backups are scheduled to run every Sunday at 22:00 Eastern Time. Differential backups are scheduled to run every Monday through Saturday at 22:00 Eastern Time. The computer fails on Thursday at 9:00 Eastern Time. You need to restore the computer from the backup by using the most recent data available. You must achieve this goal by using the minimum amount of administrative effort. You reinstall Windows XP Professional on the computer. What should you do next?（） 

    • A、Restore Wednesday’s differential backup. 
    • B、Restore Sunday’s normal backup. Restore Wednesday’s differential backup. 
    • C、Restore Sunday’s normal backup. Restore Monday’s differential backup. Restore Tuesday’s differential backup. Restore Wednesday’s differential backup. 
    • D、Restore Sunday’s normal backup. Restore Wednesday’s differential backup. Restore Tuesday’s differential backup. Restore Monday’s differential backup. 

    正确答案:B

  • 第9题：

    名词解释题
    差分备份（Differential Backup）

    正确答案： 查分备份就是上次备份的数据是相对于上一次全备份之后新增加的修改过的数据，注意是相对于上一次全备份之后新增加或修改过的数据，而并不一定是相对上一次备份。
    解析： 暂无解析

  • 第10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11题：

    单选题
    Which of the following is the FINAL step in the backup process？（）
    A

     Load differential tape

    B

     Verify backup

    C

     Load new tapes

    D

     Perform a full backup


    正确答案： B
    解析： 暂无解析

  • 第12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13题：

    Which of the following allows an administrator to recover the MOST data?（）

    • A、System image
    • B、Incremental backup
    • C、System state restore
    • D、Differential backup

    正确答案:A

  • 第14题：

    A company utilizes the GFS backup standard. Which of the following describes this backup method?（）

    • A、Greatest, Final, Sequential
    • B、Full, Partial, Incremental
    • C、Monthly, Weekly, Daily
    • D、Full, Differential, Incremental

    正确答案:C

  • 第15题：

    Which of the following BEST describes the difference between differential and incremental backups？（）

    • A、 An incremental backup requires fewer tapes for restoration than a differential backup. 
    • B、 A differential backup tape takes less time than an incremental backup tape.
    • C、 A differential backup requires fewer tapes for restoration than an incremental backup.
    • D、 An incremental backup tape costs less than a differential backup tape.

    正确答案:C

  • 第16题：

    Due to operational commitments， a system has a very short backup window during the week， but is not used from Saturday morning through Sunday at Midnight. Which of the following minimizes backup time， while providing the best data restore coverage？（）

    • A、Full backups every night
    • B、Differential backups every night
    • C、Full backup Saturday night， incremental backups the rest of the week
    • D、Full backup Saturday night， differential backups the rest of the week

    正确答案:C

  • 第17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18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19题：

    . You have a server that runs Windows Server 2003 Service Pack 2 (SP2). You back up the files on the server by using the following schedule: ·Full backup every Sunday ·Differential backup at 01:00 every Monday to Friday You want to restore the version of a file stored on the server at the start of the business day on Wednesday. You are unsure when the file was last modified. You need to restore the appropriate version of the file by using the minimum number of tapes. Which backup jobs should you review to locate the correct version of the file? （）

    • A、the differential backup from Tuesday
    • B、the differential backup from Wednesday and then the full backup from Sunday
    • C、the full backup from Sunday
    • D、the full backup from Sunday and then all other backups

    正确答案:B

  • 第20题：

    Which of the following backup types will reset the archive bit on files backed up？（）

    • A、Copy
    • B、Full
    • C、Snapshot
    • D、Incremental
    • E、Differential

    正确答案:B,D

  • 第21题：

    单选题
    Which of the following BEST describes the difference between differential and incremental backups？（）
    A

     An incremental backup requires fewer tapes for restoration than a differential backup. 

    B

     A differential backup tape takes less time than an incremental backup tape.

    C

     A differential backup requires fewer tapes for restoration than an incremental backup.

    D

     An incremental backup tape costs less than a differential backup tape.


    正确答案： A
    解析： 暂无解析

  • 第22题：

    单选题
    . You have a server that runs Windows Server 2003 Service Pack 2 (SP2). You back up the files on the server by using the following schedule: ·Full backup every Sunday ·Differential backup at 01:00 every Monday to Friday You want to restore the version of a file stored on the server at the start of the business day on Wednesday. You are unsure when the file was last modified. You need to restore the appropriate version of the file by using the minimum number of tapes. Which backup jobs should you review to locate the correct version of the file? （）
    A

    the differential backup from Tuesday

    B

    the differential backup from Wednesday and then the full backup from Sunday

    C

    the full backup from Sunday

    D

    the full backup from Sunday and then all other backups


    正确答案： C
    解析： 暂无解析

  • 第23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

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