Microsoft
70-518 · Question #52
70-518 Question #52: Real Exam Question with Answer & Explanation
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Question
You are designing a Windows Presentation Foundation (WPF) application by using Microsoft .NET Framework 4, Microsoft Visual Studio 2010, and Microsoft SQL Server 2008. You have designed the application to use the ADO.NET Entity Framework for the Data Access Layer (DAL). You have designed the user interface (UI) of the application by using the Model-View-ViewModel (M-V-VM) pattern. The middle tier of the application is designed by using Windows Communication Foundation (WCF). The database schema changes often. The DAL entity objects are required to be referenced from the middle tier and the ViewModel layer of the UI. You need to ensure that the DAL entity objects are updated when the database schema changes. What should you do?
Exhibit
Options
- AEntity objects are being used. => A, B out
- BThe DAL always have to be updated not only when you are retrieving the data. => D out
- CCreate persistent-aware objects.
- DCreate persistent-ignorant objects.
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