You are developing a Windows Communication Foundation (WCF) service. The service needs to access out-of-process resources.
You need to ensure that the service accesses these resources on behalf of the originating caller.
What should you do?

• A. Set the value of ServiceSecurityContext.Current.WindowsIdentity.ImpersonationLevel to TokenImpersonationLevel.Impersonation.
• B. Set the PrincipalPermissionAttribute on the service contract and update the binding attribute in the endpoint element of the configuration file to wsHttpBinding.
• C. Set the PrincipalPermissionAttribute on the service contract and update the bindingConfiguration attribute in the endpoint element of the configuration file to wsHttpBinding.
• D. Set the value of ServiceSecurityContext.Current.WindowsIdentity.ImpersonationLevel to TokenImpersonationLevel.Delegation.

A Windows Communication Foundation (WCF) service implements the following cortract.
<ServiceContract0>? Public Interface lHeloServic e <operationContractQ> <WebGet(UriTempbte: ="helloname={name}")s Function SayHello(Byval name As String) As nng End Interface The implementation is as follows Public Class HelloService Implements IHelloService
Public Function SayHello(ByVal name As String) As String - Implements lHelloServiceSayHello
Retumn "Hello "& name
End Function
End Cesst
The service is self-hosted, and the hosting code is as follows.
Dim stHost As WebServiceHo = CreateHost()
svcHo Open()
Consde ReadLine()
svcHoaClose()
You need to implement CreateHost so that the service has a single endpoint hosted
http:/Ilocalhost8000/HeloService.
Which code segment should you use?

• A. Dim baseAddress As Ur New Uri("http:/i1ocahost:8000r) Dim svcHo As WebServiceHost
  =
  New WebServiceHost(GetType(HelloService), baseAddress)
  svc Host.AddServiceEndpoint(GdType(lHelloService),?
  New Web Http Binding (WebHttpSec urityMode None),
  HelloService)
  Return svc Host
• B. Dim baseAddress As Ur = New Uri("http/I1ocahost 8OOOP Dim svcHo As
  WebServiceHost = New
  WebServiceHost(New HelloService0, baseAddress)
  svc HostAddServiceEndpoint(GdType(IHelIoService),
  New WebHttpBinding(WebHttpSecuntyMode None),
  "HelloService")
  Return svc Host
• C. Dim svc Host As WebSennceHost = New WebServiceHost(GetType(HdloService))
  svc HotsAddServiceEndpoint(GdType(lHelloService),
  New WebHttpBinding(WebHttpSecurityModeNone),
  "http:/Ibc alhost 8000!HelloService")
  Return svc Host
• D. Dim svc Host As WebServiceHost = New WebServiceHost(New HelloSennceO)
  svcHost.AddServiceEndpoint(GetType(IHelloService),
  New WebHttpBinding(WebHttpSecurityModeNone),
  Thttp://bc aihost: 8000/HelloSennce")
  Return svc Host

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

• A. net.msmq://localhost/system$;DeadXact
• B. net.msmq://localhost/msmq$;DeadLetter
• C. net.msmq://localhost/msmq$;FailedMessages
• D. net.msmq://localhost/system$;DeadLetter

You create a Windows Communication Foundation (WCF) service and deploy it with wsHttpBinding and message security enabled.
You create an intermediate WCF service for logging messages sent to the primary service. The intermediate service is called via the clientVia endpoint behavior.
The primary service is receiving malformed data from a client application.
You need to enable inspection of the malformed data and prevent message tampering.
What should you do?

• A. Modify the binding on the intermediate service to use netNamedPipeBinding.
• B. Specify a protection level of None in the service contract for the intermediate service. Disable message and transport security from the client application configuration file.
• C. Modify the binding on the intermediate service to use webHttpBinding.
• D. Specify a protection level of Sign in the service contract for the intermediate service. Disable transport security from the client application configuration file.

A Windows Communication Foundation (WCF) solution exposes the following service over a TCP binding. (Line numbers are included for reference only.)

MessageDatabase supports a limited number of concurrent executions of its methods.
You need to change the service to allow up to the maximum number of executions of the methods of MessageDatabase. This should be implemented without preventing customers from connecting to the service.
What should you do?

• A. Change the service behavior as follows. <ServiceBehavior(ConcurrencyMode:=ConcurrencyMode.Single, InstanceContextMode:=InstanceContextMode.PerSession)>
• B. Change the service behavior as follows.
  <ServiceBehavior(ConcurrencyMode:=ConcurrencyMode.Multiple, InstanceContextMode:=InstanceContextMode.Single)>
• C. Add a throttling behavior to the service, and configure the maxConcurrentSessions.
• D. Add a throttling behavior to the service, and configure the maxConcurrentCalls.