OCP认证052考题解析：1Z0-V8.02-第80题
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80. 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? (Choose two.)
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.
Answer: AD
本题是说星期天进行级别为0的差异增量备份操作，这个备份会操作备份整个数据库。
根据这个级别为0的备份，我们在星期一到星期六进行级别为1的差异增量备份操作。
使用差异备份，每天的备份将包含自一次差异备份以来发生的所有更改。
最后，在下一个星期天，进行别一次基本备份(即级别为0的增量备份)。
