大数据就业实战培训 Oracle就业实战培训
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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