题目内容

YouexperiencealossofthediskonwhichtheUSER_DATAtablespacedatafilesarestored.Youattempttorecoverthedatafilesbutdiscoverthatthearchivedredologfilewithsequencenumber45，whichisneededtoperformcompleterecovery，isinvalid.Youthenbeginincompleterecovery-Youreceivethisprompt：
ORA-00279：change309012...03/09/0111：33：56neededforthreadORA-00289：suggestion：
/disk1/archive/arch_45.rdoORA-00280：change309012forthread1isinsequence#45Specifylog：
{=suggested|filename|AUTO|CANCEL}
Whatisthecorrectresponse？（）

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AcompanythatmakesComputerAssistedDesign（CAD）softwarehas，withinitsapplication，someutilityclassesthatareusedtoperform3Drenderingtasks.Thecompany’schiefscientisthasjustimprovedtheperformanceofoneoftheutilityclasses’keyrenderingalgorithms，andhasassignedaprogrammertoreplacetheoldalgorithmwiththenewalgorithm.Whentheprogrammerbeginsresearchingtheutilityclasses，sheishappytodiscoverthatthealgorithmtobereplacedexistsinonlyoneclass.The programmerreviewsthatclass’sAPI，andreplacestheoldalgorithmwiththenewalgorithm，beingcarefulthatherchangesadherestrictlytotheclass’sAPI.Oncetestinghasbegun，theprogrammerdiscoversthatotherclassesthatusetheclassshechangedarenolongerworkingproperly.
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