Microsoft
70-518 · Question #48
70-518 Question #48: Real Exam Question with Answer & Explanation
The correct answer is D. Design a static class for the data that implements the INotifyPropertyChanged interface.. See the full explanation below for the reasoning.
Question
You are designing an application by using Windows Presentation Foundation (WPF) and Microsoft .NET Framework 4. The application retrieves customer data from an enterprise resource planning (ERP) system. You need to ensure that the following requirements are met: - Customer data is retrieved only once. - Customer data is available on multiple forms within the application. - Forms can implement Two-Way binding to the customer data. What should you do?
Options
- AStore the results of the query in a static DataTable object that is used by all the forms.
- BStore the results of the query in a local XML file.
- CDesign a static class for the data that implements the [Observable interface.
- DDesign a static class for the data that implements the INotifyPropertyChanged interface.
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