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Microsoft 070-518 Exam Syllabus Topics:

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

Question 1

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 custom exceptions derived from the Exception class.
C. Modify the Web service to throw exceptions of type FaultException.
D. Modify the Web service to throw custom exceptions derived from the ApplicationException class.

Question 2

You are designing an application by using Windows Presentation Foundation (WPF), Microsoft .NET Framework 4, and Microsoft SQL Server 2008.
The application will contain several forms that include custom data validators.
You need to ensure that data is validated before the database updates occur. You also need to ensure that the validation logic can be reused.
How should you design the validation?

A. Subscribe to the TextChanged event for all user interface (UI) components of the application.
Perform data validation in the event handler and alert users when a data entry error occurs.
B. Subscribe to the MouseLeave event for all user interface (UI) components of the application.
Perform data validation in the event handler and alert users when a data entry error occurs.
C. Implement the INotifyPropertyChanged interface in the data class of the application.
D. Implement the IDataErrorlnfo interface in the data class of the application.

Question 3

You are developing an application by using Microsoft .NET Framework 4 and Microsoft
Visual Studio 2010.
The application contains a grid that displays customer data stored in a database table.
Users report that the grid takes a long time to display.
You plan to implement data caching to improve loading time for the grid.
You need to ensure that the cached data expires when the customer data is updated.
What should you do?

A. Use a static variable to store the Grid object.
B. Use the System.WeB.Caching.CacheDependency class.
C. Use the System.Runtime.Caching.SqlChangeMonitor class.
D. Use the ADO.NET Entity Framework.

Question 4

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You are designing a .NET Framework 4 solution. The solution contains a Windows Presentation Foundation (WPF) application and a Windows Communication Foundation (WCF) Web service.
The WPF application uses the WCF Web service to store data in a Microsoft SQL Server 2008 database.
You have the following requirements:
Ensure that the WPF application functions while users' computers are offline.
Minimize the time spent sending data to the WCF Web service.
Minimize disk space requirements for data storage.
You need to recommend an approach for synchronizing data between the WPF application and the database.
Which two actions should you recommend? (Each correct answer presents part of the solution. Choose two.)

A. Store data in DataSet objects. Serialize data locally by using XML serialization.
B. Create a local caching solution that periodically checks for Internet connectivity and writes directly to the local data store and to the WCF Web service.
C. Create a local caching solution that periodically checks for Internet connectivity, uses local memory, and batches changes to the WCF Web service.
D. Store data in custom business objects. Serialize data locally by using custom serialization.

Question 5

You are designing a Windows Presentation Foundation (WPF) data entry application. The application uses data binding to bind controls in the user interface (UI) to business objects. The UI uses validation rules for each input control.
The data validation rules change based on the state of the business object.
You need to recommend a validation strategy that will allow changes to the validation rules without changes to the UI code.
What should you recommend?

A. Set the ValidationStep attribute on ValidationRule elements to CommittedValue.
B. Implement the IDataErrorInfo interface in the business objects and replace all ValidationRule elements with Exception ValidationRule elements.
C. Set the ValidationStep attribute on ValidationRule elements to RawProposedValue.
D. Implement the IDataErrorInfo interface in the business objects and replace all
ValidationRule elements with Data ErrorValidat ion Rule elements.

Solutions: