单项选择题

YoucanbackuptheRMANrecoverycatalogwithRMAN.（）

A.True
B.False

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Asnapshotofthe/export/projectfilesystemhasbeentaken.Priortobackingupthefilesystem，youneedtochecktoseeifcertainfilesareonthesnapshot.Thesnapshotneedstobemountedtocheckforthesefiles.Whichcommandwillmountthesnapshot？（）
A.mount-Fufs-oro/dev/fssnap/0/check
B.mount-Fufs-orw/dev/fssnap/0/check
C.mount-Fufs-oro/export/project/check
D.mount-Fufs-orw/export/project/check

A.Priortobackingupthefilesystem，youneedtochecktoseeifcertainfilesareonthesnapshot.Thesnapshotneedstobemountedtocheckforthesefiles.Whichcommandwillmountthesnapshot？（）
A.mount-Fufs-oro/dev/fssnap/0/check
B.mount-Fufs-orw/dev/fssnap/0/check
C.mount-Fufs-oro/export/project/check
D.mount-Fufs-orw/export/project/check

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YouhaveconfiguredOMFinyourdatabase.YouenabledtheALTERDATABASEENABLEBLOCKCHANGETRACKING；statementtoenabletheblockchangetrackingfeature.Whatinformationwillbewritteninthechangetrackingfile？（）

A.thesystemchangenumber
B.thelocationsoftheredologfiles
C.thelocationsofthedatafiles
D.thephysicallocationofallthedatabasechanges