A Windows Communication Foundation (WCF) solution provides a session-based counter.
The service is self-hosted. The hosting code is as follows.
Dim host As ServiceHost = New ServiceHost(GetType(CounterService))
Dim bnding As NetTcpBinding =
New NetTcpBinding(SecurityMode.None)
host.AddServiceEndpoint("MyApplication. ICounterService",
binding, "net.tcp://localhost:23456")
host. Open()
This service is currently exposed over TCP, but needs to be exposed to external clients over HTTP.
Therefore, a new service endpoint is created with the following code.
host.AddServiceEndpoint(''MyApplication. lCounterService",
binding2, "http:/!localhost:12345'
You need to complete the implementation and ensure that the session-based counter will perform over HTTP as it does over TCP.
What should you do?

• A. Define binding2 as follows.
  Dim binding2 As WSHttpBinding = - New WSHttpBinding(SecurityMode.None) Add the
  following behavior to the service implementation. <ServceBehavior(lnstanceContextMode:
  1nstanceContextMode.PerSession)s
• B. Define binding2 as follows.
  Dim binding2 As WS2007HttpBinding =
  New WS200lHttpBinding(SecurityMode. None) Configure binding2 as follows.
  binding2.ReliableSession.Enabled = True
• C. Define binding2 as follows.
  Dim binding2 As BasicHttpBinding = New BasicHttpBinding(BasicHttpSecurityMode.None)
  Enable cookies for
  binding2.
  binding2.AllowCookies = True
• D. Define binding2 as follows.
  Dim binding2 As BasicHttpBinding = New BasicHttpBinding(BasicHttpSecurityMode. None)
  add the following behavior to the service implementation.
  <ServiceBehavior(lnstanceContextMode:
  1nstanceContextMode.Single)>

You are developing a Windows Communication Foundation (WCF) service to provide shopping cart support. ASP.NET compatibility mode is not enabled.
The shopping cart information must be retained across user visits to the store until the user explicitly empties the cart or submits the cart contents to order.
You need to implement the service as a DurableService.
Which two actions should you perform? (Each correct answer presents part of the solution. Choose two.)

• A. In the method to add an item to the shopping cart, serialize the shopping cart contents after adding the current item and storing it in a Session variable.
• B. Use basicHttpBinding for both the client application and the service.
• C. Use wsHttpContextBinding for both the client application and the service.
• D. Create the persistence provider database and configure the persistenceProvider element of the service behavior to point to that database.

DRAG DROP
You develop a Windows Communication Foundation (WCF) service that is hosted within a console application. The service implements the IRegistrationService interface in a class named RegistrationService.
You need to add code to the console application to host the WCF service.
How should you complete the relevant code? (To answer, drag the appropriate code segment to the correct location in the answer area. Each code segment may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.)

You are creating a Windows Communication Foundation (WCF) service that implements the following service contract.
<ServiceContract()>
Public Interface IOrderProcessing
<OperationContract()>
Sub ApproveOrder(ByVal id As Integer)
End Interface
You need to ensure that only users with the Manager role can call the ApproveOrder method. What should you do?

• A. In the method body, check the Rights.PossessProperty property to see if it contains Manager.
• B. Add a SecurityPermission attribute to the method and set the SecurityAction to Demand.
• C. Add a PrincipalPermission attribute to the method and set the Roles property to Manager.
• D. In the method body, create a new instance of WindowsClaimSet. Use the FindClaims method to locate a claimType named Role with a right named Manager.