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  • 【第32题】2019年OCP-12C-062最新考试原题-32

    32、choose three

    Backup requirements for a database:

    * Level 0 backup on Sunday

    * Cumulative incremental level 1 backup on Monday, Wednesday, and Saturday

    * Differential incremental level 1 backup on Tuesday, Thursday, and Friday

    Which three statements are true about the strategy?

    A) Level 1 backup on Tuesday, Thursday, and Friday contains all the blocks that have been changed since the last level 0 backup.

    B) Level 1 backup on Tuesday, Thursday, and Friday contains all the blocks that have been changed since the last level 1 backup.

    C) Level 0 backup on Sunday contains all the blocks that have been formatted.

    D) Level 0 backup on Sunday contains all the blocks that have been changed since the last level 1 backup.

    E) Level 1 backup on Monday, Wednesday, and Saturday contains all the blocks that have been changed since the last level 0 backup.

    Answer:BCE

    (解析:答案B是差异增量备份,备份的是自从上一次同一级或者更低一级的改变的数据块;0级备份类似于full备份,备份的是所有的有数据的数据块;累积增量备份备份的自从上一次更低一级的以来的改变的块,所以E答案是对的。来自3组:1015267481)

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  • 原文地址:https://www.cnblogs.com/cnblogs5359/p/10874393.html
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