题目内容

YouworkasadatabaseadministratoratCertkiller.com.YourdatabaseisopenandrunninginARCHIVELOGmode.YoutakeRMANfullbackupseverySundaynight.OnMondaymorning，whilequeryingtheuser1.employeestable，youreceivethefollowingerrormessage：
01578：ORACLEdatablockcorrupted（file#5，block#51）
ORA-01110：datafile5：’/u01/app/oracle/oradata/orcl/example01.dbf’
Youneedtorectifythecorruptionwhileensuringthefollowing：
Thedatafileshouldremainonline.
Themeantimetorecover（MTTR）shouldbeminimal.
Youarenotusingabackupcontrolfileandallthearchivedlogsareaccessible.
Whichoptionwouldyouchoose？（）

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YouexperiencealossofthediskonwhichtheUSER_DATAtablespacedatafilesarestored.Youattempttorecoverthedatafilesbutdiscoverthatthearchivedredologfilewithsequencenumber45，whichisneededtoperformcompleterecovery，isinvalid.Youthenbeginincompleterecovery-Youreceivethisprompt：
ORA-00279：change309012...03/09/0111：33：56neededforthreadORA-00289：suggestion：
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{=suggested|filename|AUTO|CANCEL}
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