Oracle 11G OCP 1Z0-052 31

（31）Which statement is true about the UNDO_RETENTION parameter when retention guarantee is not enabled?

A. It is the time period after which the undo data becomes obsolete.

B. It  is  the  time  period  after  which  the  committed  undo  data  would  be transferred  to  a  temporary tablespace.

C. It is the minimum time period up to which the committed undo data would be retained if free undo space is available.

D. It is the time period after which the undo data is transferred to the Flash Recovery Area to provide read consistency.

答案：（C）

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