OCP认证的052考试新加考试题收集整理-第45题

OCP认证考试的题库变了，Oracle的这次变更持续了不短的时间，而且到现在还在不停的加入新题，这里收集整理了一些052考试新题，希望对大家通过OCP有帮助。

45、Which two are true about UNDO data?

A. Inactive UNDO is never written to disk.

B. Active UNDO is always kept in memory

C. Only DML statements generate UNDO.

D. Active UNDO can never be overwritten.

E. It can be used to restore a table by using FLASHBACK TABLE.

F. Inactive UNDO cannot be overwritten until the elapsed time since becoming inactive exceeds UNDO RETENTION.

Correct Answer: DE

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