DRAG DROP
There is a WCF (Windows Communication Foundation) service application PassGuideApp.
PassGuideApp is required to provide service to a heavy client request load, even simulatanous
requests. Stateful conversation must be provided for each ensure subsequent individual client request.
Which attribute should be added to the class implementation?

Contract exhibit:
[ServiceContract(CallbackContract typeof(INameService))]
public interface IGreetingSennce
{
[OperationContract]
string GetMessage0,
}
[ServiceContract]
public interface INameService
{
[OperationContract]
string GetName();

}
IGreetingService interface exhibit:
<ServiceContract(CallbackContract typeof(INameService))>
Public Interface IGreetingService
<OperationContract>
Function GetMessage() As String
End Interface
<ServiceContract>
Public Interface INameService
<OperationContract>
Function GetNamne() As String
End Interface
Hosting code exhibit:
Dim host As ServiceHost =
New ServiceHost(GetType(GreetingService))
Dim binding As NetTcpBinding =
New NetTc pBindng(SecurityMode.None)
Host.AddServiceEndpoint(“PassGuideAppIGreetingService”,
binding, net.tcp:localhost = “96374″)
Host Open()
INameService interface exhibit:
class NameService INameService
{
string name;

public NameService(string name)
{
this.name = name;
}
public string GetName()
{
return name;
}}
Class NameService
Implements INameService
Dim name As String
Public Sub NameService(ByV name As String)
Me.reme = name
End Sub
Public Function GetName() As String -Impements INameService. GeNamee
Return name
End Function
End Class
There is a WCF (Windows Communication Foundation) service PassGuideService.
PassGuideService is self-hosted.
The implementations of contracts, the IGreetingService interface, the hosting code, and the
INameService interface are all being displayed in the exhibits.
At the moment the above code fails at line “return String.Format(“Hi there {0}, clientName);”.
You need to tweak the code in order to make it work.
What should you do? (select three)

Use code…

DRAG DROP

There is a WCF (Windows Communication Foundation) service PassGuideService.
Which WCF service code should be used when your goal is to provide the clients a good response
time from PassGuideService?

DRAG DROP
There is a WCF (Windows Communication Foundation) service PassGuideService.
Which WCF service code should be used when your goal is to provide the clients a good response
time from PassGuideService?

DRAG DROP
Service implementation exhibit:

Class PassGuideService
Implements IPassGuideService
Public Sub PassGuideOne(ByVal value As String) —
Implements IPassGuideService. OperationOne
…
End Sub
Public Sub PassGuideTwo(ByVal value As String) —
Impements IPassGuideService. PassGuideTwo
…
End Sub
Contract exhibit:
<ServiceContract(SessionMode s SessionMode.Required)>
Publc Interface IPassGuideService
<OperationContract(IsOneWay=True, IsInitiating=True)>
Sub PassGuideOne(ByVal value As String)
<OperationContract(IsOneWay=True, IsInitiating=False)>
Sub PassGuideTwo(ByVal value As String)
End Interface
There is a WCF (Windows Communication Foundation) service PassGuideService.
The contract and implementation of PassGuideService is being displayed in the exhibits.
NetMsmqBinding us used by PassGuideService to listen for messages.
The queue is configured to use transactions for removing and adding messages.
How can you ensure that PassGuideOp1 and PassGuideOp2 runs within the same transaction
whenever they are called within the same session?

DRAG DROP
ContractExhibit:

<ServiceContract>
Public Interface IPassGuideService
<OperationContract>
Sub SaveEmployee(Byval employee As Employee)
End Interface
Binding exhibit:
Dim binding As NetTcpBinding = New NetTcpBinding With (TransactionFlow = True)
Client Call exhibit:
using (TransactionScope ts = new TransactionScope(TransactionScopeOption.Required))
{
IPassGuideService client = factoryCreateChannel();
client SaveEmployee(employee);
Console.WriteLine(
Transaction.CurrentTransactiominformation
DistributedIdentifier);
tsComplete();
}
SaveEmployee Exhibit:
Public Sub SaveEmployee(ByVal employee As Employee)_
Implements IPassGuideService SaveEmployee
employee.Save()
ConsoleWriteLine(TransactionCurrentTransactionlnformation.
Distributedldentifier)
End Sub

There is a WCF (Windows Communication Foundation) service PassGuideService.
The service and the client has the service contract displayed in the contract exhibit.
The binding of the service and the client is displayed in the binding exhibit.
The client call exhibit displays how the client calls PassGuideService.
The implementation of the PassGuideService SaveEmployee method is displayed in the
SaveEmployee Exhibit.
However, there is a problem. There is distributed identifier mismatch between the client and
PassGuideService.
How can this be remedied?

DRAG DROP
There is a WCF (Windows Communication Foundation) solution for PassGuide.
You need to specify the contract complying to the following requirements:
PassGuideInitialize can always be called before PassGuideTerminate is called.
PassGuideSomething can only be called after PassGuideInitialize has been called.
PassGuideSomething cannot be called after PassGuideTerminate has been called.
PassGuideTerminate can only be called after PassGuideInitialize has been called.
Which contract should be used?

DRAG DROP
Hosting Code Exhibit:
Dim host As ServiceHost = New ServiceHost(GetType(CounterService))
Dim bidl As NetTcpBinding =
New NetTcpBinding(SecurityMode.None)
host.AddServiceEndpoint(”PassGuideApp.ICounterService”,
binding, “net.tcp://localhost: 98765”)
host.Open()
Bind2 exhibit:
host.AddServiceEndpoint(‘’PassGuideApp.ICounterService”,
bind2, “http:/!localhost: 98765”)

There is a WCF (Windows Communication Foundation) self-hosted service PassGuideService.
PassGuideService provides a session-based counter.
PassGuideService is exposed over TCP.
The PassGuideService hosting code is being displayed in the exhibit.
PassGuideService must also be exposed over HTTP for external clients.
The session-counter must be able to perform over HTTP at it does over TCP.
How should bind2 be defined and configured?

DRAG DROP
Exhibit:
<ServiceContract>
<ServiceBehavior(ConcurrencyMode =
ConcurrencyMode.Multiple)>
Public class DataAccessService
<OperationContract>
Public Function PutMessage(ByVal message As String)
MessageDatabase.PutMessage(message)
<OperationContract>
Public Function SearchMessages(ByVal search As String) as String
Return MessageDatabase.SearchMessages(search)
End Function
End Class
There is a WCF (Windows Communication Foundation) service PassGuideService.
PassGuideService is specified in the exhibit.
PassGuideService is used over a TCP binding.
At the moment MessageDatabase only support a small finite number of concurrent executions of
the methods belonging to it.
While not preventing users to connecting to PassGuideService you need to tweak the
performance of PassGuideService so it allows the maximum number calls the methods.
What should be done?

DRAG DROP
Exhibit:
<ServiceContract>
PuElic Interface ITeamMessageService
<OperationContract>

Function GetMessage() As String
<OperationContract>
Sub PutMessage(Byval message As String)
End Interface
There is a WCF (Windows Communication Foundation) service PassGuideService.
PassGuideService uses the contract being displayed in the exhibit.
PassGuideService is used to share messages between the clients.
You need to ensure that all the clients receive the same message from the GetMessage method,
even if the PutMessage method is used by another client.
Which code should be used?