Microsoft 070-513 Exam Questions : TS: Windows Communication Foundation velopment with Microsoft .NET Framework 4

You have a Windows Communication Foundation (WCF) service.
The service has issues with performance when it receives messages on a specific endpoint. The service must collect the minimum number of performance counters to diagnose the message issues.
You need to configure the service.
In the web.config file for the service, what should you do?

• A. Enable message logging for the endpoint.
• B. In the service configuration diagnostics section, set the value of the performanceCounters property to ServiceOnly.
• C. In the service configuration diagnostics section, set the value of the performancCounters property to All.
• D. Enable the Windows Management Instrumentation (WMI) provider.

You are developing a Windows Communication Foundation (WCF) service that does not operate on a duplex channel.
You find that operations do not start until all previous operations have finished. The service hosting code contains the following lines.
var service = new WarehouseService();
var host = new ServiceHost(service);
You need to ensure that new operations do not wait for previous operations to finish.
Which attribute should you use to decorate the service?

• A. [ServiceBehavior(
  InstanceContextMode = InstanceContextMode.Single,
  ConcurrencyMode = ConcurrencyMode.Multiple)]
• B. [ServiceBehavior(
  InstanceContextMode = InstanceContextMode.Single,
  ConcurrencyMode = ConcurrencyMode.Reentrant) ]
• C. [ServiceBehavior(
  InstanceContextMode = InstanceContextMode.Single,
  ConcurrencyMode = ConcurrencyMode.Single) ]
• D. [CallbackBehavior(
  ConcurrencyMode = ConcurrencyMode.Multiple) ]

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 svc Host As WebServiceHost = New WebServiceHost(New HelloSennceO)
  svcHost.AddServiceEndpoint(GetType(IHelloService),
  New WebHttpBinding(WebHttpSecurityModeNone),
  Thttp://bc aihost: 8000/HelloSennce")
  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 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

You are configuring services to be discoverable. The services must be discoverable without relying on a central server. Client applications that consume the services are on a network segment that is separate from the network segment that the services are located on.
A firewall blocks all TCP ports between the two network segments, but allows other protocols to pass through.
You need to ensure that the client applications can discover the services.
What should you do?

• A. Use managed discovery mode over HTTP.
• B. Use ad-hoc discovery mode over UDP.
• C. Use ad-hoc discovery mode over HTTP.
• D. Use managed discovery mode over UDP.

You are developing a Windows Communication Foundation (WCF) service that is hosted by a Windows Forms application.
The ServiceHost instance is created in the Form constructor.
You need to ensure that the service is not blocked while the UI thread is busy.
What should you do?

• A. Decorate the service implementation class with the following line of code.
  <ServiceBehavior(
  ConcurrencyMode:=ConcurrencyMode.Multiple)>
• B. Decorate the service implementation class with the following line of code.
  <ServiceBehavior(
  UseSynchronizationContext:=False)>
• C. Call the BeginInvoke method of the form and supply a delegate.
• D. Call the Invoke method of the form and supply a delegate.