Online Access Free 070-518 Exam Questions

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).
You plan to design the exception handling strategy for the application. Each method in the middle tier will contain the following catch block. Catch e AsArgumentNullException.
Throw e
When testing the application, you discover that all ArgumentNullExceptions that occur in
the middle tier do not contain accurate stack trace information.
What should you do?

• A.Use a DispatcherUnhandledExceptionEvent handler in the middle 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 UI tier.

You are upgrading a stand-alone Windows Presentation Foundation (WPF) application and an XAML browser application (XBAP) to Microsoft .NET Framework 4.
You plan to add .NET 4 types and members to both applications.
Both applications consume a common utility assembly that modifies files on a local file system. The utility assembly requires full trust.
You need to ensure that both applications can use the common utility assembly without any security-related exceptions.
What should you do?

• A.Apply the AllowPartiallyTrustedCallersAttribute attribute to the XBAP application.
• B.Apply the AllowPartiallyTrustedCallersAttribute attribute to the utility assembly.
• C.Change the <supportedRuntime> element for the XBAP application to the .NET Framework 3.5.
• D.Change the <supportedRuntime> element for the WPF application to the .NET Framework 3.5.

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 FaultExceptton.
• B.Modify the Web service to throw custom exceptions derived from the Exception class.
• C.Modify the Web service to throw custom exceptions derived from the ApplicationException class.
• D.Modify the Web service to throw exceptions of type InvalidOperationException

You are designing a Windows Forms application that allows users to search a product catalog and place orders.
You have the following requirements:
- Display a progress indicator while the application is searching the catalog. - Ensure that users can cancel search operations.
You need to recommend an approach that meets the requirements.
What should you recommend?

• A.Implement the search as a Windows Communication Foundation (WCF) service by using the AsyncPattern property of the OperationContractattribute.
• B.Execute the search on the user interface thread. Provide a Cancel button to cancel the search.
• C.Implement the search as a duplex service.
• D.Use a BackgroundWorker component to perform the search.

You design a Windows Presentation Foundation (WPF) application that connects to a Microsoft SQL Server 2008 database.
The WPF application becomes unresponsive at times. When the WPF application is running, physical memory usage is between 90 percent and 95 percent.
You need to recommend a tool that will identify the memory usage characteristics of the WPF application.
Which tool should you recommend?

• A.Event Tracing for Windows (ETW)
• B.SQL Profiler
• C.Application Center Test (ACT)
• D.CLR Profiler