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Microsoft TS: Windows Communication Foundation velopment with Microsoft .NET Framework 4 Sample Questions:

1. DRAG DROP
You are preparing to deploy a Windows Communication Foundation (WCF) service to a production environment.
The service must not be vulnerable to a man-in-the-middle attack. You need to configure the service to use X.509 certificate security.
Which four actions should you perform in sequence? (To answer, move the appropriate actions from the list of actions to the answer area and arrange them in the correct order.)

2. A Windows Communication Foundation (WCF) solution uses the following contract to share a message across its clients (Line numbers are included for reference only)
01 <ServiceContract0>
02PuElic Interface ITeamMessageService
04 <OperationContractO>
05Function GetMessage() As String
06
07 <OperationContract0>
08Sub PutMessage(Byval message As String)
O9End Interface
The code for the serAce class is as follows.
10 Public Class TeamMessageService0
11 Implements lTearmt4essageService
12
1 3Dim key As Guid = Guid.NewGuid()
1 4Dim message As String = "Today's Message'
15
16PuUic Function GetMessage0As String -
1 7lmpements lTearm*AessageServiceGetMessage
18
1 9Retun String. Fommat("Message:{0) Key:{ 1}", message, key)
20End Function
21
22PubIic Sub PutMessage(ByV message As Stnng) -
23lmpements lTearrlessageService PutMessage
24
25Me message = message
26End Sub
27
28End Class
The service is self-hosted The hosting code rs as follows
29Dim host As ServiceHost =
New ServiceHost(GetType(TearrwiessageSeMce))?
3ODim binding As Basic HttpBindngt
New BasicHttpBindiig(BasicHttpSecurityMode. None) 31 host.AddServiceEndpoint(
"MyAppication lTearrtAessageService", binding
Thttp /Ilac aihost. 1 2345)
32host Open()
You need to ensure that all clients calling GetMessage will retrieve the same string, even if the message is upd(ed by clients calling PutMessage what should you do?

A) Pass a service instance to the instancing code in line 29, as follows.
Dim host As ServiceHost z New ServiceHost(New TeamMessageServiceO)
B) Add the following attribute to the TeamMessageService class, before line 1 0002E
<ServiceBehavior( lnstanceContextll ode. = InstanceContextMode. PerSession)>
C) Add the following attribute to the TeamMessageService class, before line 10.
<ServceBehavior(lnstanceContextMode lnstanceContextMode. Single)>
D) Redefine the message string in line 14, as follows.
Shared message As String "Today's Message"
Then change the implementation of PutMessage in lines 22-26 to the following
Public Sub PutMessage(ByVal message As rng) - Implements ITean-
MessageService.PutMessage
TeamMessageSenAce.message = message End Sub

3. You are developing a Windows Communication Foundation (WCF) service that is used to
check the status of orders placed by customers. The following code segment is part of your service. (Line numbers are included for reference only.)

You need to ensure that the service always listens at net.pipe://SupplyChainServer/Pipe. What should you do?

A) Option D
B) Option A
C) Option C
D) Option B

4. Your company has an existing Windows Communication Foundation (WCF) service that allows business partners to place orders. The service uses netMsmqBinding.
You find that processing every order in its own transaction is causing a delay.
You need to ensure that the service is configured to process multiple orders in one transaction.
What should you do?

A) Use <serviceThrottling> service behavior and set the maxConcurrentCalls attribute.
B) Use <dispatcherSynchronizationBehavior> endpoint behavior and set the maxPendingReceives attribute.
C) Use <synchronousReceive> endpoint behavior.
D) Use <transactedbatching> endpoint behavior and set the maxBatchSize attribute.

5. You are creating a Windows Communication Foundation (WCF) service that is implemented as folks. (Line numbers are included for reference only.)
01 <ServiceContract()
02<ServiceBehaior(lncludeExceptionDetailInFaults: Time)>
03Public Class OrderService
04
05eCNperationCortracto()>
O6Putdic Sub Submit Order(ByVal anOrder As Order)
07
08Try
09. 10Catch ex As D wide By Zero Exception 11 12End Try 13End Sub 14 1 5End Class
You need to ensure that the sack trace details of the exception are not included in the error information sent to the client. What should you do?

A) Replace line 11 with the following line.
Throw New FaultException(C Order)(anOrder, exToSthng0)d
B) Replace line 11 with the following line.
Throw
C) After line 05, add the following line.
'cFaultContract(GetType(FautException(Of Order)))>
Replace line 11 with the following line.
Throw ex
D) After line 05, add the following line.
<FaultContract(GetType(FaultException(CX Order)))>
Replace line 11 with the following line.
Throw New FaultException(CX Order)(
anOrder, "Divide by zero exception")

Solutions: