WhichthreeJVMoptionswouldyouaddtoinvestigateperformanceissuesinaHot-SpotJVM?()
A. -xx:+PrintGCDetails
B. -xx:+PrintGCTimeStamps
C. -xx:+HandlePromotionFailure
D. -verbose:gc
E. -server
在穆勒五法中“分析结果,因果对应。果有剩余,必有隐因。”是指()
A. 求同法
B. 差异法
C. 求同差异共用法
D. 共变法
E. 剩余法
Giventhatcisareferencetoavalidjava.io.Consoleobject,and:11.Stringpw=c.readPassword("%s","pw:");12.System.out.println("got"+pw);13.Stringname=c.readLine("%s","name:");14.System.out.println("got",name);Iftheusertypesfidowhenpromptedforapassword,andthenrespondsbobwhenpromptedforaname,whatistheresult?()
Anexceptionisthrownatruntime
B. pw:fidogotfidoname:bobgotbob
C. pw:gotfidoname:bobgotbob
D. Compilationfails.
Verysoonyouwillbeperformingmaintenanceoperations.Youwouldhaveseveraljobstorunassoonasthemaintenanceperiodstarts.Whichmethodwouldyouusetocreatejobswithoutspecifyingthetimeperiodwhenthejobshouldberun?()
A. useDBMS_IJOBpackage
B. useOracleScheduler
C. useDBMS_JOBpackage
D. useOracleDataPumpExportandImport