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You are reviewing an existing Windows application that uses .NET Framework 4.
When the user clicks a button, the application sequentially processes thousands of image files contained in a directory.
The user interface becomes unresponsive while the application processes the files.
You have the following requirements:
Modify the button's click event.
Increase application throughput by processing multiple image files concurrently.
Ensure that the user interface remains responsive while the application processes
the image files.
You need to recommend an approach for meeting the requirements.
What should you recommend?

• A. Use the Parallel.ForEach() method to process the images concurrently.
• B. Use the ThreadPool.QueueUserWorkItem() method to queue up a single work item that uses the Parallel.ForEach () method to process the image files concurrently.
• C. Iterate over the image files. For each image file, use the Process.Start() method to launch a console application that processes the image file.
• D. Iterate over the image files by using the Parallel.ForEach()method. For each image file, start a separate thread that processes the image file, by using the Thread.Start() method.

You are designing a Windows Presentation Foundation (WPF) application that will be used to display real-time data from a Microsoft SQL Server 2008 database.
You need to recommend an approach for displaying the datA.
Which two actions should you recommend? (Each correct answer presents part of the solution. Choose two.)

• A. Use a System.Runtime.Caching object in the data layer with a sliding expiration, and query the database when the Cache object expires.
• B. Use a SqlCacheDependency object in the data layer to query the database when a change is detected.
• C. Implement OneWayToSource binding between the controls in the WPF application and objects in the data layer.
• D. Implement OneWay binding between the controls in the WPF application and objects in the data layer.

You are designing an n-tier solution that connects to a Microsoft SQL Server 2008 database.
You plan to deploy the database to development machines and to a staging database server from within Microsoft Visual Studio 2010. You plan to set up separate build configurations for development and staging. You also plan to deploy to multiple production database servers managed by an outside vendor.
You must not allow the outside vendor to access the Visual Studio projects.
You need to recommend an approach for configuring and deploying the production database servers.
Which two actions should you recommend? (Each correct answer presents part of the solution. Choose two.)

• A. Use VSDBCMD to deploy the production databases.
• B. Use a SQL Server 2008 Database Project.
• C. Use SQL Server 2008 Management Studio to deploy the production databases.
• D. Use a Visual Basic SQL CLR Database Project.

You are developing a Windows Presentation Foundation (WPF) application by using Microsoft .NET Framework 4 and Microsoft Visual Studio 2010.
The application will run in a partially trusted sandbox.
You plan to deploy the application on client computers by using the ClickOnce deployment technology. You plan to sign the deployment and application manifest by using a trusted publisher certificate.
You need to ensure that the following requirements are met:
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Users are not prompted for elevated permissions during application deployment. The application can request elevated permissions at runtime.
Where should you install the trusted publisher certificate?

• A. In the trusted root store on each client computer
• B. In the trusted publisher store on each client computer
• C. In the trusted root store on the deployment server
• D. In the trusted publisher store on the deployment server

You are designing a Windows Presentation Foundation (WPF) application by using Microsoft .NET Framework 4 and Microsoft Visual Studio 2010.
You need to ensure that the following requirements are met:
All UI elements are labeled.
All property values are exposed.
Keyboard navigation contains tab stops for all controls.
The application functions on high contrast displays.
Which testing strategy should you recommend?

• A. Stress testing
• B. Stability testing
• C. Usability testing
• D. Accessibility testing
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