单项选择题 Aclient/serverapplicationhasbeenconfiguredtouselocalnaming.Theclientandserverrunonseparatemachines.Whentheclienttriestoconnect，itreceivesaTNSerror.Bycarefullyexaminingtheenvironment，atnsnames.oraisfoundonlyontheOracleservermachine，amongotherthings.Aftercopyingthistnsnames.oraontotheclientmachine，theclientisabletoconnecttotheserver.Whichstatementistrue？（）A.tnsnames.oramustbeontheclientmachineforlocalnaming.B.tnsnames.oramustberemovedfromtheserverfortheconnectiontowork.C.tnsnames.oramustbeonboththeclientandservermachinesforlocalnaming.D.tnsnames.oraisnotrequiredforlocalnaming;theproblemwasnotfixedbycopyingthefiletotheclient.

单项选择题 Whichstatementistrueregardingcheckpointsandrecovery？（）

单项选择题 WhicharerequiredinitializationparametersinanOracleSharedServerenvironment？（）