单选题

If a backup is expired, which of the following is true?()  

A It can never be used for a restore/recover operation.

B Oracle will remove the backup set pieces from the flash recovery area.

C The backup has been used at least once to restore and recover the database.

D The backup is no longer valid because of a resetlogs operation.

E The physical backup set pieces are missing from the media.

正确答案

来源:www.examk.com

答案解析

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