You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4 to create an application. The
application connects to a Microsoft SQL Server database. The application uses the following object query
to load a product from the database. (Line numbers are included for reference only.)
01using (AdventureWorksEntities advWorksContext = new AdventureWorksEntities())
02{
03ObjectQuery <Product> productQuery = advWorksContext.Product.Where("it.ProductID = 900");
04
05}
You need to log the command that the query executes against the data source. Which code segment
should you insert at line 04?

• A. Trace.WriteLine(productQuery.ToString());
• B. Trace.WriteLine(productQuery.CommandText);
• C. Trace.WriteLine(productQuery.ToTraceString());
• D. Trace.WriteLine(((IQueryable)productQuery).Expression);

You need to design a solution for capturing an exception. Which approach should you recommend?

• A. Use a HandleError attribute.
• B. Use a Page_Error method.
• C. Use an Application_Error method.
• D. Use a customErrors element.

You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4 to create an application. The
application uses the ADO.NET Entity Framework to model entities. The application allows users to make
changes to entities while disconnected from the central data store.
You need to ensure that when the user connects to the central data store and retrieves new data, the
application meets the following requirements:
*Changes made to the local data store in disconnected mode are preserved.
*Entities that have already been loaded into the local data store, but have not been modified by the user,
are updated with the latest data.
What should you do?

• A. Call the query's Execute method by using the MergeOptions.AppendOnly option.
• B. Call the Refresh method of ObjectContext by using the RefreshMode.StoreWins option.
• C. Call the query's Execute method by using the MergeOptions.OverwriteChanges option.
• D. Call the Refresh method of ObjectContext by using the RefreshMode.ClientWins method.

Your Windows Communication Foundation (WCF) client application uses HTTP to communicate with the
service. You need to enable message logging and include all security information such as tokens and
nonces in logged messages.
What should you do?

• A. In the application configuration file, add the following XML segment to the system.serviceModel configuration section group. <diagnostics>
  <messageLogging logMessagesAtTransportLevel="true"
  logEntireMessage="true" />
  </diagnostics>
• B. In the machine configuration file, add the following XML segment to the system.serviceModel configuration section. <machineSettings enableLoggingKnownPii="true" /> Generate the ContosoService class using the Add Service Reference wizard. Add the following code segment. Dim client As ContosoService = New ContosoService() client.Endpoint.Behaviors.Add(New CallbackDebugBehavior(True))
• C. In the application configuration file, add the logKnownPii attribute to the message logging diagnostics source and set the value of the attribute to true. Generate the ContosoService class using the Add Service Reference wizard. Add a reference to System.ServiceModel.Routing.dll. Add the following code segment. Dim client As ContosoService = New ContosoService() Dim behavior As SoapProcessingBehavior = New SoapProcessingBehavior() behavior.ProcessMessages = True client.Endpoint.Behaviors.Add(behavior)
• D. In the machine configuration file, add the following XML segment to the system.serviceModel configuration section. <machineSettings enableLoggingKnownPii="true" /> In the application configuration file, add the logKnownPii attribute to the message logging diagnostics source and set the value of the attribute to true. In the application configuration file, add the following XML segment to the system.serviceModel configuration section group. <diagnostics>
  <messageLogging logMessagesAtTransportLevel="true"/>
  </diagnostics>

You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4 to create a Windows Communication Foundation (WCF) Data Services service. The service connects to a Microsoft SQL Server 2008 database. The service is hosted by an Internet Information Services (IIS) 6.0 server. You need to ensure that applications authenticate against user information stored in the database before the application is allowed to use the service. Which two actions should you perform? (Each correct answer presents part of the solution. Choose two.)

• A. Configure IIS to allow anonymous access.
• B. Configure IIS to require Windows authentication.
• C. Modify the Data Services service to use a Microsoft ASP.NET membership provider.
• D. Enable the WCF Authentication Service.
• E. Configure IIS to require basic authentication.