1: 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.
Correct Answers: A D
0级增量备份会备份所有曾经在此数据库中使用的块。
从星期一到星期六的每一天，1级增量备份备份最近1或0级增量备份以来所有更改过的块。周一备份周日0级备份以来变化的块，周二备份周一1级备份改变的块，等等。