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计算机考试试题及答案解析

未知题型

YouaretheDatabaseAdministrator（DBA）ofyourcompany.YouexecutethefollowingstatementonanOracle10ginstance：SQL>ALTERSYSTEMSWITCHLOGFILE；Whichtwotasksareperformedwhenthestatementisexecuted？（）
A.TheDBWnprocesswritestothedatafile.
B.Changesinthebackgroundprocessarerecorded.
C.ThelogfileisupdatedwiththecurrentSCNnumber.
D.TheSystemChangeNumber（SCN）isrecordedinthecontrolfile.
E.Thechangestothelistenerconfigurationinthelistener.orafilearerecorded.
【参考答案】

A, D

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