【OCP新题】2019年OCP 12c考试062新出现的考题-第32题

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2018年的时候，OCP 11g考试题库大更新，052 053出现了很多新题，

2019年，11g即将停考的前期，Oracle又出现了一次大变动，12c出现了很多新题，比如062 063题库大更新

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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。)