wuaji 发表于 2015-11-9 10:32:16

OCP-1Z0-053-200题-146题-234

　　QUESTION 146
　　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
　　Answer: A
　　同234题：http://blog.iyunv.com/rlhua/article/details/11820583
　　

　　Explanation/Reference:
　　Section: Backup, Recovery & Recovery Manager (RMAN)
　　A cumulative level 1 backup contains only the blocks that have changed since the last level 0 incremental backup.
　　A full backup contains all used data blocks.
　　A whole backup contains all used and unused data blocks.
　　A differential level 1 backup contains only the datablocks that have changed since the last level 1 or level 0 incremental backup.
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