You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. You write the following code fragment.
<StackPanel TextBox.PreviewTextInput=”StackPanel_PreviewTextInput”>
<TextBox Name=”TxtBoxA”/>
<TextBox Name=”TxtBoxB”/>
<TextBox Name=”TxtBoxC”/>
</StackPanel>

You create an event handler named StackPanel_PreviewTextInput. You also have a collection of strings named Keywords. You need to ensure that TxtBoxA and TxtBoxB do not contain any of the strings in the Keywords collections. Which code segment should you use?

You are moving a Windows Communication Foundation (WCF) service into production. You need to be able to monitor the health of the service. You only want to enable all performance counter instances exposed by the ServiceModelService 4.0.0.0 counter group. Which element should you add to the system.serviceModel section in the application configuration file?

You are creating a Windows Communication Foundation (WCF) service based on WSHttpBinding. New audit requirements dictate that callers must be authenticated on every call to ensure that their credentials have not been revoked. You need to ensure that the service will not cache the security request token. What should you do?

The endpoint of a Windows Communication Foundation (WCF) service uses basicHttpBinding for its binding. Your company’s policies have changed to require that messages not be sent in clear text. You must ensure that all messages are encrypted when traveling across the network. What should you do?

Four Windows Communication Foundation (WCF) services are hosted in Microsoft Internet Information Services (IIS). No behavior configuration exists in the web.config file. You need to configure the application so that every service and endpoint limits the number of concurrent calls to 50 and the number of concurrent sessions to 25. Which XML segment should you add to the system.serviceModel configuration section of the web.config file?

You are adding a Windows Communication Foundation (WCF) service to an existing application. The application is configured as follows. (Line numbers are included for reference only.)
01 <configuration>
02 <system.serviceModel>
03 <services>
04 <service name=”Contoso.Sales.StockService”
05 behaviorConfiguration=”MetadataBehavior”>
06 <host>
07 <baseAddresses>
08 <add baseAddress=”http://contoso.com:8080/StockService” />
09 </baseAddresses>
10 </host>
11 </service>
12 </services>
13 <behaviors>
14 <serviceBehaviors>
15 <behavior name=”MetadataBehavior”>
16 </behavior>
17 </serviceBehaviors>
18 </behaviors>

You need to configure the service to publish the service metadata. Which two actions should you perform? (Each correct answer presents part of the solution. Choose two.)

A Windows Communication Foundation (WCF) service is responsible for transmitting XML documents between systems. The service has the following requirements: It must minimize the transmission size by attaching the XML document as is without using escape characters or base64 encoding. It must interoperate with systems that use SOAP but are not built on the .NET platform. You need to configure the service to support these requirements. Which message encoding should you use?

You are developing a Windows Communication Foundation (WCF) service that reads messages from a public nontransactional MSMQ queue. You need to configure the service to read messages from the faileddelivery queue. Which URI should you specify in the endpoint configuration settings of the service?

A Windows Communication Foundation (WCF) service has the following contract.

<ServiceContract(Namespace:=”http://contoso.com”)>
Public Interface IShipping

<OperationContract()>
Function DoWork(ByVal id As Integer) As String
End Interface

This is one of several service contracts hosted by your application. All endpoints use SOAP 1.2 bindings with WSAddressing 1.0. The System.ServiceModel.MessageLogging trace source in the system.diagnostics configuration section is configured with one listener. You need to make sure that only the messages that are returned from the DoWork operation are logged. Which XML segment should you add to the system.serviceModel/diagnostics/messageLogging/filters configuration element?

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?