You are using tracing to diagnose run-time issues when you look at the traces for the service in Svc Trace viewer exe, you see what is shown in the exhibit (Click the Exhibit button)

The exception trace is selected in Svc Trace reviewer exe.
You need to interpret the trace results to determine where the error occurred and what to do next.
What should you do?

• A. This issue occurred in the ServiceHost during ServiceHost Open. Enable WMI by adding the following configuration to the system.serviceModel configuration section in the application configuration file <diagnostics wmiProviderEnabledetrue'!> Restart the application and inspect the endpoints visible through WMI
• B. This issue occurred at the ServiceHost when accepting an initial set of messages from MSMQ.Log all messages sent between the clients and sever.
• C. This issue occurred at the Service Host when receiving a message Compare the security configurations on the client and server to make sure that they are compatible
• D. This issue occurred in the Service Host during Service Host. Open. Compare the security settings for any endpoints that use an MSMQ transport to the security configuration of the MSMQ queue used by the endpoint

You are developing an application to update a users social status. You need to consume the service using Windows Communication Foundation (WCF).
The client configuration is as follows.
<system.serviceModel>
<bindings>
<webHttpBinding>
<binding name="SocialConfig">
<security mode="TransportCredentialOnly">
<transport clientCredentialType="Basic"
realm="Social API" />
</security>
</binding>
</webHttpBinding>
</bindings>
<client>
<endpoint address= " http:// contoso .com "
binding="webHttpBinding"
bindingConfiguration="SocialConfig"
ontract="ISocialStatus"
name="SocialClient" />
</client>
</system.serviceModel>
The service contract is defined as follows.
<ServiceContract()>
Public Interface ISocialStatus
<OperationContract()>
<WebInvoke(UriTemplate:="/statuses/update.xml?status={text}")>
Sub UpdateStatus(ByVal text As String)
End Interface
Which code segment should you use to update the social status?

• A. Using factory As ChannelFactory(Of ISocialStatus) =
  New WebChannelFactory(Of ISocialStatus)(GetType(ISocialStatus))
  factory.Credentials.UserName.UserName = user.Name
  factory.Credentials.UserName.Password = user.Password
  Dim socialChannel As ISocialStatus =
  factory.CreateChannel() socialChannel.UpdateStatus(newStatus) End Using
• B. Using factory As ChannelFactory(Of ISocialStatus) =
  New ChannelFactory(Of ISocialStatus)("POST")
  factory.Credentials.Windows.ClientCredential.UserName =
  user.Name
  factory.Credentials.Windows.ClientCredential.SecurePassword.SetAt(
  0, user.Password)
  Dim socialChannel As ISocialStatus = factory.CreateChannel()
  socialChannel.UpdateStatus(newStatus)
  End Using
• C. Using factory As WebChannelFactory(Of ISocialStatus) =
  New WebChannelFactory(Of ISocialStatus)(GetType(ISocialClient))
  factory.Credentials.Windows.ClientCredential.UserName =
  user.Name
  factory.Credentials.Windows.ClientCredential.SecurePassword.SetAt(
  0, user.Password)
  Dim socialChannel As ISocialStatus = factory.CreateChannel()
  socialChannel.UpdateStatus(newStatus)
  End Using
• D. Using factory As WebChannelFactory(Of ISocialStatus) =
  New WebChannelFactory(Of ISocialStatus)("SocialClient")
  factory.Credentials.UserName.UserName = user.Name
  factory.Credentials.UserName.Password = user.Password
  Dim socialChannel As ISocialStatus =
  factory.CreateChannel()
  socialChannel.UpdateStatus(newStatus)
  End Using

A Windows Communication Foundation (WCF) service only accepts messages that are signed and encrypted.
A client application is not receiving expected responses from the service.
You need to enable logging to verify that the messages from the client are signed and encrypted. You also need to see what each message looks like before the message body is deserialized into a .NET object.
What should you do?

• A. Configure the System.ServiceModel trace source in the system.diagnostics
  configuration section. In the system.serviceModel configuration, add the following XML
  segment.
  <diagnostics>
  <messageLogging logEntireMessage="true" logMessagesAtServiceLevel="true" /> </diagnostics>
• B. Configure the System.ServiceModel.MessageLogging trace source in the
  system.diagnostics configuration section. In the system.serviceModel configuration, add
  the following XML segment.
  <diagnostics>
  <messageLogging
  logMessagesAtServiceLevel="true"
  logMessagesAtTransportLevel="true" />
  </diagnostics>
• C. Configure the System.ServiceModel trace source in the system.diagnostics
  configuration section. In the system.serviceModel configuration, add the following XML
  segment.
  <diagnostics>
  <messageLogging
  logEntireMessage="true"
  logMessagesAtServiceLevel="true"
  logMessagesAtTransportLevel="true" />
  </diagnostics>
• D. Configure the System.ServiceModel.MessageLogging trace source in the
  system.diagnostics configuration section. In the system.serviceModel configuration, add
  the following XML segment.
  <diagnostics>
  <messageLogging
  logEntireMessage="true"
  logMessagesAtServiceLevel="true"
  logMessagesAtTransportLevel="true" />
  </diagnostics>

You are creating an ASP.NET Web application that hosts several Windows Communication
Foundation (WCF) services. The services have ASP.NET Compatibility Mode enabled. Users authenticate with the Web application by using a cookie-based ASP.NET Forms Authentication model.
You add a service file named Authentication.svc that contains the following code segment.
<%@ ServiceHost
Service="System.Web.ApplicationServices.AuthenticationService"
Factory="System.Web.ApplicationServices.ApplicationServicesHostFactory" %>
You need to ensure that users can access the WCF services without having to re-authenticate.
Which two configuration settings should you add (Each is part of a complete solution. Choose two.)

• A. Add a service endpoint with basicHttpBinding for the contract System.Web.ApplicationServices.AuthenticationService.
• B. Add a custom service behavior named AuthenticationServiceTypeBehaviors with a serviceAuthenticationManager element that has serviceAuthenticationManagerType set to System.Web.Security.SqlMembershipProvider.
• C. In the system.web.extensions/scripting/webServices/authenticationService element, set the enabled attribute to true.
• D. In the system.web.extensions/scripting/webServices/profileService element, set the enabled attribute to true.

You are creating a Windows Communication Foundation (WCF) service. You do not want to expose the internal implementation at the service layer. You need to expose the following class as a service named Arithmetic with an operation named Sum.
public class Calculator
{ public int Add(int x, int y)
{
}
}
Which code segment should you use?

• A. [ServiceContract(ConfigurationName="Arithmetic")] public class Calculator
  {
  [OperationContract(Action="Sum")]
  public int Add(int x, int y)
  {
  .....
  }
  }
• B. [ServiceContract(Name="Arithmetic")] public class Calculator
  {
  [OperationContract(ReplyAction="Sum")]
  public int Add(int x, int y)
  {
  .....
  }
  }
• C. [ServiceContract(Name="Arithmetic")]
  public class Calculator
  { [OperationContract(Name="Sum")]
  public int Add(int x, int y)
  {
  ....
  }
  }
• D. [ServiceContract(Namespace="Arithmetic")]
  public class Calculator
  {
  [OperationContract(Action="Sum")]
  public int Add(int x, int y)
  {
  .....
  }
  }