Which type of backup contains only the blocks that have changed since the last level 0 incremental backup？（） <br>A: a cumulative level 1 backup<br>B: a differential level 1 backup<br>C: a full backup<br>D: a whole backup

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

出自：Oracle认证

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