OCP 052考试换题库后的新题整理-第31题
OCP考试换题库了，oracle这种突然的变化让很多考生不敢报考，而且052 053还在不断加入新题，大大加大了考试的难度，这里整理了一些052的新题，希望对大家有帮助。
31、Which three are true about undo segments and undo tablespaces in the same database and instance?
A. Multiple transactions run by the same Oracle user can share a single undo segment.
B. Multiple transactions run by different Oracle users can share a single undo segment.
C. A serial transaction can use multiple undo segments.
D. Undo segments are automatically dropped shortly after transactions that use them commit.
E. A new undo segment is always created for each transaction.
F. A database can have multiple undo tablespaces.
Correct Answer: ABF
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