You are designing a complex and critical Windows desktop application by using Microsoft
.NET Framework 4 and Microsoft Visual Studio 2010.
You plan to implement a logging strategy for the application.
You need to record all unexpected errors that occur in the application.
What should you do?

• A. Subscribe to the unhandled exception event handler for the application's dispatcher on the main application thread.
  Record relevant application-specific information to an external log.
• B. Create a global WIN 32 unhandled exception filter.
  Record relevant application-specific information to an external log from within the filter.
• C. Subscribe to the unhandled exception event handler for the AppDomain object.
  Record relevant application-specific information to an external log.
• D. Create a generic catch (Exception e) block in the Main method of the application.
  Record relevant application-specific information to a log in the Main method.

You are working with an existing Windows Presentation Foundation (WPF) application in Microsoft Visual Studio 2010. The WPF application requires approximately one minute to initialize before displaying its main window.
You have the following requirements:
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Immediately display a splash screen when the WPF application launches. Allow for the display of an initialization progress bar on the splash screen. Close the splash screen when the WPF application is ready to display the main window.
You need to recommend an approach for meeting the requirements.
What should you recommend?

• A. Launch a custom splash screen by using a Window object. When the initialization completes, launch the main window from the splash screen.
• B. Compile an image into the WPF application with a Build Action value of SplashScreen.
• C. Move the initialization code to the code-behind of the main window.
• D. Create a SplashScreen object. Display the object in the code-behind of the App.xaml file.

You are creating a Windows Presentation Foundation (WPF) application by using Microsoft .NET Framework 4 and Microsoft Visual Studio 2010.
The application will consist of several data entry forms. Each data entry form requires a user to enter phone numbers and addresses.
You need to design a solution that promotes code reusability.
What should you do?

• A. Create a new merged resource dictionary and reference it from each data entry form.
• B. Use the same style resource for each data entry form.
• C. Add multiple text boxes for each data entry form.
• D. Create a new user control and reference it on each data entry form.

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?

• A. Design a static class for the data that implements the INotifyPropertyChanged interface. Raise the PropertyChanged event to notify the forms when data is changed.
• B. Store the results of the query in a static DataTable object that is used by all the forms.
• C. Design a static class for the data that implements the IObservable interface. Subscribe to the static class from each of the forms that use the datA.
• D. Store the results of the query in a local XML file. Bind all forms to an XMLDataAdapter object that references the local XML file.