未知题型

A.TheDBWnprocesswritestothedatafile.
B.Changesinthebackgroundprocessarerecorded.
C.ThelogfileisupdatedwiththecurrentSCNnumber.
D.TheSystemChangeNumber(SCN)isrecordedinthecontrolfile.
E.Thechangestothelistenerconfigurationinthelistener.orafilearerecorded.
【参考答案】

A, D

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