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

1. An existing Windows application uses a Windows Communication Foundation (WCF) Web service that is available only to employees.
You have the following requirements:
---
Make the WCF Web service available to business partners.
Enable business partners to send a profile token.
Ensure that the currently deployed application continues to function.
You need to recommend a solution that meets the requirements.
What should you recommend?

A) Convert the WCF Web service to a Duplex service that implements a callback to accept the profile token.
B) Implement the WCF Web service as a REST service.
C) Modify the WCF Web service operations to accept the profile token as an additional parameter.
D) Use SOAP headers to pass the profile token to the service operations.

2. ---
You are analyzing a Windows client application that uses Microsoft Visual Studio 2010 and Microsoft SQL Server 2008.
The application updates two database tables from the main user interface (UI) thread.
You need to ensure that the following requirements are met:
The database tables are either updated simultaneously or not updated at all.
Users are notified of the success or failure of the updates.
Users are able to perform other tasks during the update process.
What should you do?

A) Use TransactionScope in a Using block on the UI thread.
Batch the database updates by setting the DbDataAdapter.UpdateBatchSize property to 2.
B) Use TransactionScope in a Using block on the UI thread.
Create a DependentTransaction object within the block and pass the object to the BackgroundWorkerReportProgress method.
Use the object in the ReportProgress method to create a new TransactionScope block.
C) Move the database update logic to a BackgroundWorker thread.
Ensure that the thread is enclosed in a TransactionScope Using block in the BackgroundWorkerDoWork method.
D) Use TransactionScope in a Using block on the main thread.
Create a BackgroundWorker thread within the block.
Move the database updates to the BackgroundWorkerDoWork method.

3. ---
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 2010.
B) Include the primary interop assembly for Excel 2007.
C) Embed the Excel 2010 COM library.
D) Embed the type information from the Excel 2010 COM library.

4. You are designing a Windows Presentation Foundation (WPF) application that accesses a business tier. The business tier is implemented as a Windows Communication Foundation (WCF) service and stores data in a Microsoft SQL Server 2008 database.
The WCF service will be accessed by external applications that do not use the .NET Framework.
You need to recommend an approach for passing data between layers.
What should you recommend?

A) Use a DataSet object.
B) Use custom .NET classes with XML serialization.
C) Use custom .NET classes with binary serialization.
D) Use the DiffGram XML format.

5. You are designing a Windows Forms application. The application connects to a Microsoft SQL Server 2008 database.
You need to recommend an approach for retrieving and logging all informational messages and error messages reported by the database.
What should you recommend?

A) Retrieve informational messages in a SqlException object. Retrieve error messages by creating a handler for the InfoMessage event.
B) Retrieve informational messages and error messages in a SqlException object.
C) Retrieve informational messages and error messages by creating a handler for the InfoMessage event.
D) Retrieve informational messages by creating a handler for the InfoMessage event. Retrieve error messages in a SqlException object.

Solutions: