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

1. You are designing an application by using Windows Presentation Foundation (WPF) and
Microsoft .NET Framework 4.
The user interface (UI) tier of the application will be implemented in WPF.
The middle tier of the application is implemented by using an existing COM component.
The middle tier contains a long-running method named ProcessDatA.
You need to ensure that users can continue to use the UI while ProcessData is running.
What should you do?

A) Call the DoEvents method of the Application class before invoking ProcessDatA.
B) Use the Invoke method of the Dispatcher class to call ProcessDatA.
C) Use an asynchronous worker thread to call ProcessDatA.
D) Call the Run method of the Dispatcher class before invoking ProcessDat

2. You are designing a new feature for an existing Windows Forms application by using Microsoft .NET Framework 4.
The application contains multiple forms that are loaded into a parent Multiple Document Interface (MDI) form. Your company policy does not allow the use of third-party controls.
You need to ensure that the new feature meets the following requirements: - It provides a three-dimensional scale model.
- It allows users to change the colors of the model and communicates the color
selections back to the application. - It allows the model to scale, based on the user's client computer display resolution. - It is a child form in the MDI application.
What should you do?

A) Design the new feature in a new application by using Windows Presentation Foundation (WPF).
Invoke the new WPF application from the existing Windows Forms application.
B) Design the new feature in a new Windows Presentation Foundation (WPF) application.
Host the existing application inside the new WPF application by using the WindowsFormsHost class
C) Design the new feature in the existing Windows Forms application as a Windows form.
Add the form as a child form to the MDI window.
D) Design the new feature by using a Windows Presentation Foundation (WPF) user control.
Use the ElementHost class to host the WPF user control in the existing Windows Forms application.

3. You design a Windows Presentation Foundation (WPF) application that interacts with a Windows Communication Foundation (WCF) Web service. The WCF Web service throws exceptions of type Exception.
The WPF application crashes when the WCF Web service throws an exception.
You need to recommend an error-handling strategy that allows users to submit updated data to the WCF Web service without restarting the WPF application.
What should you recommend?

A) Modify the Web service to throw exceptions of type InvalidOperationException
B) Modify the Web service to throw exceptions of type FaultExceptton.
C) Modify the Web service to throw custom exceptions derived from the ApplicationException class.
D) Modify the Web service to throw custom exceptions derived from the Exception class.

4. You are designing a Windows Presentation Foundation (WPF) application that uses .NET
Framework 4.
The WPF application will be deployed to 5,000 users worldwide.
You need to recommend an approach for identifying problems that users will experience.
Which testing methodology should you recommend?

A) Usability testing
B) Acceptance testing
C) Integration testing
D) Functional testing

5. ---
You are designing updates to a Windows solution that processes complex scientific datA.The solution extracts analyzed data from Microsoft Excel by using an application-level add-in.
You have the following requirements:
Deploy the Excel add-in to client machines with the application.
Ensure that the solution supports Excel 2007 and Excel 2010.
Minimize the size of the deployment package.
You need to recommend an approach that meets the requirements.
What should you recommend?

A) Include the primary interop assembly for Excel 2007.
B) Include the primary interop assembly for Excel 2010.
C) Embed the type information from the Excel 2010 COM library.
D) Embed the Excel 2010 COM library.

Solutions: