You are designing a Windows application by using Microsoft .NET Framework 4 and Microsoft Visual Studio 2010.
You plan to implement control caching to improve the loading time of a control. It is not required to refresh the content of the control after the application loads.
The application will be compiled by using the .NET 4 client profile.
You need to ensure that the following requirements are met:
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The control is reusable in multiple forms.
Data in the control is cached when the application is loaded.
What should you do?

• A. In the constructor of the application window, add code to load the control. Save the control to a static variable.
• B. In the constructor of the application window, add code to load the control. Save the control to the cache by using objects in the System.WeCaching namespace.
• C. In the Load event of the application window, add code to load the control. Save the control to an instance variable.
• D. In the Load event of the application window, add code to load the control. Save the control to the cache by using objects in the System.WeB.Caching namespace.

You are designing a Windows Presentation Foundation (WPF) application.
The application data files have the file name extension .abC.
The WPF application installer must meet the following requirements: - Add a shortcut to the desktop. - Install infrequently used assemblies on demand.
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Associate the .abc file name extension with the WPF application. Roll back the installation in the event of a failure.
You need to recommend a deployment method.
What should you recommend?

• A. XCopy
• B. ClickOnce
• C. Background Intelligent Transfer Service (BITS)
• D. Windows Installer

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:
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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.
  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.
• B. Move the database update logic to a BackgroundWorker thread.
  Ensure that the thread is enclosed in a TransactionScope using block in the BackgroundWorkerDoWork method
• C. Use TransactionScope in a using block on the UI thread.
  Batch the database updates by setting the DbDataAdapter.UpdateBatchSize property to 2.
• 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.

You are evaluating an existing Windows Presentation Foundation (WPF) application. The WPF application runs in a Web browser as a XAML browser application (XBAP). The WPF application runs in the Intranet zone with Full Trust. A client certificate for the WPF application has been generated.
Users are unable to access the WPF application. You locate the following message in the security log: "User has refused to grant required permissions to the application." Users state that they are clicking OK in all message boxes that appear.
You need to recommend an approach for ensuring that the WPF application runs correctly on all client computers.
Which two actions should you recommend? (Each correct answer presents part of the solution. Choose two.)

• A. Import the client certificate to the Trusted Root store.
• B. Sign the ClickOnce manifest for the WPF application.
• C. Use the Code Access Security Policy Tool to grant the appropriate permissions.
• D. Modify the ClickOnce manifest for the WPF application to grant the appropriate permissions.