You are designing a Windows Presentation Foundation (WPF) application by using Microsoft .NET Framework 4 and Microsoft Visual Studio 2010.
The application will consist of a user interface (UI) tier and a middle tier. The middle tier will be implemented by using Windows Communication Foundation (WCF).
Each method in the middle tier will contain the following catch block.
Catch(ArgumentNullExceptione)
{
throw e;
}
When testing the application, you discover that all ArgumentNullExceptions exceptions that occur in the middle tier do not contain accurate stack trace information.
You need to design the exception handling strategy for the application.
What should you do?

• A. Use a DispatcherUnhandledExceptionEvent handler in the UI tier.
• B. Remove the exception parameter from the ArgumentNullException handler.
• C. Create an ArgumentNullException handler in the UI tier.
• D. Use a DispatcherUnhandledExceptionEvent handler in the middle tier.

You are designing an n-tier .NET Framework 4 solution that includes a Windows Presentation Foundation (WPF) application. The WPF application will access data stored in a Microsoft SQL Server 2008 database by using the solution's data access tier.
The data access tier must also be available from within Microsoft Excel 2010.
You need to recommend a technology for accessing the data access tier.
Which technology should you recommend?

• A. LINQ to SQL
• B. LINQ to XML
• C. ADO.NET Entity Framework 4
• D. WCF Data Services

You are designing a Windows Presentation Foundation (WPF) application for your company by using Microsoft .NET Framework 4 and Microsoft Visual Studio 2010.
The business layer of the application is implemented by using Windows Communication Foundation (WCF).
You plan to support non-repudiation and data integrity for WCF messages.
You need to design the security strategy for the application.
What should you do?

• A. Encrypt the WCF messages by using the Internet Protocol Security (IPSec) protocol.
• B. Implement message-level security by using digital certificates as client computer credentials.
• C. Attach a digital signature to the WCF messages.
• D. Encrypt the WCF messages by using the Secure Sockets Layer (SSL) protocol.

You are designing an update to an existing Windows Presentation Foundation (WPF) application. You plan to use Microsoft Visual Studio 2010. The updated WPF application will require a specific version of a third-party component.
You have the following requirements:
- Deploy the update by using Windows Installer. - Update the WPF application only if the required version of the third-party component is present on the client computer.
You need to recommend configuration settings for the application installer.
Which property should you recommend be set?

• A. The Version property of the .NET Launch Condition
• B. TheRemovePreviousVersions property of the Setup Project
• C. The Version property of the Setup Project
• D. The Condition property of a new Launch Condition

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 and 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 in a SqlException object. Retrieve 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.