单项选择题
A. Class MyDictionary Implements Dictionary （Of String，String）
B. Class MyDictionary Inherits HashTable
C. Class MyDictionary Implements IDictionary
D. Class MyDictionary End Class Dim t as New Dictionary （Of String， String） Dim dict As MyDIctionary= CType （t，MyDictionary）
单项选择题 YouworkasanapplicationdeveloperatCER-Tech.com.Cert-Tech.comusesVisualstudio.NET2005asitsApplicationDevelopmentplatform.Youaredevelopinga.NETFramework2.0applicationusedtostoreatype-safelistofnamesande-mailaddresses.Thelistwillbepopulatedallatonesfromthesorteddatawhichmeansyouwillnotalwaysneedtoperforminsertionordeletionoperationsonthedata.Youarerequiredtochooseadatastructurethatoptimizesmemoryuseandhasgoodperformance.Whatshouldyoudo？（）
单项选择题 您正在开发.NET Framework2.0应用程序用于存储类型安全列表中的姓名和电子邮件地址。列表中将填充所有在那些从排序的数据，这意味着您不总是需要执行插入或删除对数据的操作。您需要选择一种数据结构，优化内存使用，并且具有良好的性能。你应该做什么？（）
多项选择题 YoucreateMicrosoftWindows-basedapplications.Youcreateanapplicationthatrequiresuserstobeauthenticatedbyadomaincontroller.Theapplicationcontainsaseriesofprocessorintensivemethodcallsthatrequiredifferentdatabaseconnections.Abugisreportedduringtesting.Thebugdescriptionstatesthattheapplicationhangsduringoneoftheprocessor-intensivecallsmorethan50percentofthetimeswhenthemethodisexecuted.Yourunittestforthesamemethodwassuccessful.Youneedtoreproducethebug.Whichtwofactorsshouldyouascertainfromthetester？（）