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1、OracleDBAOracleDBA 认证考试存储管理试题及答案认证考试存储管理试题及答案Q.1:Oracleimmediatelyre-usesthespaceassignedtorow-Q.1:Oracleimmediatelyre-usesthespaceassignedtorow-directoryportionofthedatablockonceyoudeletethecorrespondindirectoryportionofthedatablockonceyoudeletethecorrespondingrows.grows.1.True2.False2Q.2:Whichofth

2、efollowingthreeportionsofadatablockarecollQ.2:WhichofthefollowingthreeportionsofadatablockarecollectivelycalledasOverhead.ectivelycalledasOverhead.1.tabledirectory,rowdirectoryandrowdata2.datablockheader,tablediretoryandfreespace3.tabledirectory,rowdirectoryanddatablcokheader4.datablockheader,rowdat

3、aandrowheader3Q.3:WhichportionofthedatablockcontainstableorindexdataQ.3:Whichportionofthedatablockcontainstableorindexdata1.tabledirectory2.rowdirectory3.overhead4.rowdata4Q.4:WhatarethetwospacemanagementparametersforcontrolingQ.4:Whatarethetwospacemanagementparametersforcontrolingtheuseoffreespacei

4、nadatablocktheuseoffreespaceinadatablock1.INITIALandNEXT2.PCTFREEandPCTUSED3.TABLESPACEandSTORAGE4.freespacecannotbecontrolledatblocklevel2Q.5:ThemaximumnumberoftransactionsthatablockcansupportiQ.5:Themaximumnumberoftransactionsthatablockcansupportis s1.1002.2553.10004.unlimited2Q.6:whatisPCTFREEQ.6

5、:whatisPCTFREE1.Aspacemanagementparameterwhichsetsasidethatmuchpercentageofmemoryinthedatablockforfutureupdateofexistingrows.2.Aspacemanagementparameterwhichdeterminestheminimumpercentageofablockthatcanbeusedforrowdataplusoverhead.3.AspacemanagementparameterwhichtellsOraclethattheblockisavailablefor

6、insertsafterthepercentageofusedmemoryfallsbelowcertainpercentage.4.allofthem1Q.7:WhatisthedefaultvalueofNEXTparameterQ.7:WhatisthedefaultvalueofNEXTparameter1.1block2.2blocks3.5blocks4.100blocks3Q.8:WhichparameterreservesthemorespaceforfutureupdatesQ.8:Whichparameterreservesthemorespaceforfutureupda

7、tes1.highPCTINCREASE2.highPCTFREE3.highINITIAL4.highPCTUSED2Q.9:PCTFREEandPCTUSEDtogethershouldnotexceedQ.9:PCTFREEandPCTUSEDtogethershouldnotexceed1.1002.503.254.101Q.10:RowmigrationisaresultofQ.10:Rowmigrationisaresultof1.notenoughspaceinablockfornewrows.2.notenoughmemoryforsorts3.notenoughspacefo

8、rupdatesinthecurrentblock4.allofthem3Q.11:FrequentdeallocationofextentsresultinQ.11:Frequentdeallocationofextentsresultin1.truncatedsegments2.blockfragmentation3.truncatedtablespaces4.tablespacefragmentation4Q.12:WhichbackgroundprocesscoalescethefragmentedspaceQ.12:Whichbackgroundprocesscoalescethefragmentedspace1.SMON2.PMON3.DBWR4.LGWR1Q.13:RowmigrationisaresultofQ.13:Rowmigrationisaresultof1.highPCTF

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