单项选择题 AWindowsAzureapplicationretrievesdatafromSQLAzure.Youneedtorecommendanapproachforimprovingapplicationqueryperformance.Whatshouldyourecommend？（）

单项选择题 YouaredesigningaWindowsAzureapplication.TheapplicationincludesawebroleandaworkerrolethatcommunicatebyusingaWindowsAzureQueue.Theworkerroleprocesseseachmessagewithin10secondsofretrievingitfromthequeue.Theworkerrolemustprocesseachmessageexactlyonetime.Ifaprocessdoesnotcomplete，theworkerrolemustreprocessthemessage.Youneedtorecommendanapproachfortheworkerroletomanagemessagesinthequeue.Whatshouldyourecommend？（）A.Processthemessageandthendeleteitfromthequeue.B.Deletethemessagefromthequeuewhenretrievingthemessage.C.Setthevisibilitytimeoutofthemessageto1whenretrievingthemessage.D.Processthemessageandthensetthevisibilitytimeoutofthemessagetothemaximumvalue.

单项选择题 AWindowsAzureapplicationstoresdatainaSQLAzuredatabase.Theapplicationwillstartanoperationthatincludesthreeinsertstatements.YouneedtorecommendanapproachforrollingbacktheentireoperationiftheconnectiontoSQLAzureislost.Whatshouldyourecommend？（）A.Ensurethatallstatementsexecuteinthesamedatabasetransaction.B.CreateastoredprocedureinthedatabasethatwrapstheinsertstatementsinaTRYCATCHblock.C.CreateastoredprocedureinthedatabasethatwrapstheinsertstatementsinaTRANSACTIONblock.D.Openanewconnectiontothedatabase.Useaseparatetransactionscopetorollbacktheoriginaloperation.