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Microsoft PRO: Design & Develop Wndws Apps Using MS .NET Framework 4 Sample Questions:

1. You are designing a Windows Presentation Foundation (WPF) application by using Microsoft .NET Framework 4 and Microsoft Visual Studio 2010.
The application will consist of a user interface (UI) tier and a middle tier. The middle tier will be implemented by using Windows Communication Foundation (WCF).
Each method in the middle tier will contain the following catch block.
Catch(ArgumentNullExceptione)
{
throw e;
}
When testing the application, you discover that all ArgumentNullExceptions exceptions that occur in the middle tier do not contain accurate stack trace information.
You need to design the exception handling strategy for the application.
What should you do?

A) Use a DispatcherUnhandledExceptionEvent handler in the middle tier.
B) Use a DispatcherUnhandledExceptionEvent handler in the UI tier.
C) Create an ArgumentNullException handler in the UI tier.
D) Remove the exception parameter from the ArgumentNullException handler.

2. You are designing a Windows Presentation Foundation (WPF) client application from which
employees will access a Web service.
Business partners will access the Web service by using proprietary client applications.
You need to recommend a solution for ensuring the integrity of data in the system.
What should you recommend?

A) Implement data validation at the service layer and reject invalid datA.
B) Secure the Web service by using SSL.
C) Encrypt data while storing it in the database.
D) Implement data validation on the client and reject invalid datA.

3. ---
You are designing a distributed Windows Presentation Foundation (WPF) application. You have the following requirements:
Ensure that all errors are logged in a central location.
Ensure that the WPF application logs related errors within a single transaction.
Secure error information during transmission.
You need to recommend a strategy for collecting error information.
What should you recommend?

A) Write the information to the Windows Application log on each client system. Use Windows Error Reporting to collect the results.
B) Write the information to the Windows Application log on each client system. Use Windows Management Instrumentation (WMI) to collect the results.
C) Create a Windows Communication Foundation (WCF) service. Use the basicHttpBinding protocol to transport the information.
D) Create a Windows Communication Foundation (WCF) service. Use the wsHttpBinding protocol to transport the information.

4. You are designing an application by using Microsoft .NET Framework 4 and Microsoft Visual Studio 2010.
You plan to design an instrumentation strategy for the application.
You need to ensure that the strategy meets the following requirements:
- Captures detailed performance information. - Enables or disables diagnostic messages by using an application configuration option without requiring the application to restart.
What should you design?

A) An override to the EventLog class
B) A custom performance counter
C) An override to the Debug class
D) A custom trace listener

5. 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:
---
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) Create a SplashScreen object. Display the object in the code-behind of the App.xaml file.
C) Compile an image into the WPF application with a Build Action value of SplashScreen.
D) Move the initialization code to the code-behind of the main window.

Solutions: