题目内容

ABCCompanyhasapproximately150’000productsintheircatalogandwantstoputthesewithinaCoherencecachetoimproveperformanceandaccesstimesoftheirexistingJEEapplicationwithouttoomuchchangetoexistingcode.Thereareanumberofservletsthatgetthesameproductinformationmultipletimeswithinapage.Therearealsoanumberofserver-basedprocessesthatrunatregularintervalsandalsorequestproductinformationmanytimes.Productshavesmallchangeswhichneedtobeupdatedduringtheday.
Whatwouldbethemostappropriatecachingschemetouse？（）

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外科手消毒的目的是（)

A 1米以内
B 1.2米以内
C 1.5米以内
D 2米以内

A 资产负债率
B 现金比率
C 资本化比率
D 固定资产比率
E 股东权益比率

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？（）