單項(xiàng)選擇題

An online tablespace, TEST_TBS, is full and you realize that no server-managed tablespace threshold alerts were generated for the TEST_TBS tablespace. What could be the reason, if the TEST_TBS tablespace does not include autoextensible data files?（）

A. TEST_TBS is a small file tablespace.
B. TEST_TBS is a bigfile tablespace (BFT).
C. TEST_TBS is the default temporary tablespace.
D. TEST_TBS is a dictionary-managed tablespace.

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Which method would you use to undo the changes made by a particular transaction without affecting the changes made by other transactions?（）

A. point-in-time recovery
B. execute the ROLLBACK command with transaction number
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A. SQL Repair Advisor
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