开放封闭原则转:http://baike.baidu.com/view/2493421.htm转:http://dev.csdn.net/article/38/38826.shtm 开放封闭原则(OCP,Open Closed Principle)是所有面向对象原则的核心。软件设计本身所追求的目标....
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其他好文 时间:
2015-01-21 19:52:19
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126
使用UML不仅能够形象化的表达我们的程序思想,并且能够帮助我们提高程序的质量。一个杂乱无章的程序让维护者望而生畏,其成本也可想而知。在面向程序设计(OOD)中有5条原则是帮助我们设计一个高效、简洁的程序:1.单一职责原则(SRP) 2.开放-闭合原则(OCP) 3.Liskov替换原则(LSP).....
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2015-01-21 19:37:12
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256
QUESTION7SeetheExhibit:WhichstatementsaretrueregardingtheUSERStablespace?(Chooseallthatapply.)A.AbitmapisusedtorecordfreeextentsB.FreeextentsinformationismanagedwithinthetablespaceC.FreeextentsinformationismanagedintheSYSAUXtablespaceD.Thedatadictionarytabl..
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数据库 时间:
2015-01-20 18:28:16
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211
QUESTION5Youwanttoenablearchivingonyourdatabase.Presently,thedatabaseisrunninginNOARCHIVELOGmode.Givenbelowarethestepstoaccomplishthetaskinrandomorder:1.Shutdowntheinstance.2.ExecutetheALTERDATABASEARCHIVELOGcommand.3.Startuptheinstanceandmountthedatabase.4..
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数据库 时间:
2015-01-20 18:27:37
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221
QUESTION8Examinethevaluesforthefollowinginitializationparameters:FAST_START_MTTR_TARGET=0LOG_CHECKPOINT_INTERVAL=0Whichtwowillbetheimplicationsofthesevaluesinyourdatabase?(Choosetwo.)A.TheSGAadvisorwillbedisabledB.TheMTTRadvisorwillbedisabledC.Automaticchec..
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数据库 时间:
2015-01-20 18:26:19
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278
QUESTION6Youwanttocheckthedetailsoffewerrorsthatusershavereported.Yousearchforthealertlogfileandexecutefewcommandstofindthelocationofthealertlogfile.ViewtheExhibitandcheckthecommandsexecuted.Whatisthelocationofthealert_orcl.logfile?A.ORACLE_HOME/dbsB.ORACEL..
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数据库 时间:
2015-01-20 18:25:36
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249
QUESTION2Identifythememorycomponentfromwhichmemorymaybeallocatedfor:Sessionmemoryforthesharedserver,BuffersforI/OslavesOracleDatabaseRecoveryManager(RMAN)backupandrestoreoperationsA.LargePoolB.RedoLogBufferC.DatabaseBufferCacheD.ProgramGlobalArea(PGA)Correc..
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数据库 时间:
2015-01-19 19:20:28
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279
QUESTION3YouexecutedthefollowingcommandtocreateatablespacecalledSALES_DATA:SQL>CREATETABLESPACEsales_dataDATAFILESIZE100MSEGMENTSPACEMANAGEMENTAUTO;WhichtwostatementsaretrueabouttheSALES_DATAtablespace?(Choosetwo)A.Thedatabaseautomaticallydeterminestheex..
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数据库 时间:
2015-01-19 19:20:11
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207
QUESTION1Younoticethattheperformanceofthedatabasehasdegradedbecauseoffrequentcheckpoints.Whichtwoactionsresolvetheissue?(Choosetwo.)A.DisableautomaticcheckpointtuningB.CheckthesizeoftheredologfilesizeandincreasethesizeifitissmallC.SettheFAST_START_MTTR_TARG..
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数据库 时间:
2015-01-19 19:20:06
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171
QUESTION4InwhichofthescenariowilltheDBAperformrecovery?(Chooseallthatapply.)A.ThealertlogfileiscorruptedB.AtablespaceisaccidentallydroppedC.OneoftheredologmembersiscorruptedD.AdatabaseuserterminatesthesessionabnormallyE.Theharddiskonwhichthedatafilesisstore..
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数据库 时间:
2015-01-19 19:18:59
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210