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

1. A Windows Communication Foundation (WCF) service is deployed with netTcpBinding. This service uses a duplex message exchange pattern. You are developing the next version of the WCF service.
You discover that your company's hardware load balancer performs correctly only for WCF services that use HTTP.
You need to ensure that your service works with the load balancer.
What should you do?

A) Create a custom binding that has the compositeDuplex, textMessageEncoding, and namedPipeTransport binding elements in this order.
B) Use wsHttpBinding.
C) Use basicHttpBinding.
D) Create a custom binding that has the compositeDuplex, textMessageEncoding, and wsHttpTransport binding elements in this order.

2. A Windows Communication Foundation (WCF) solution uses the following contract.
<ServiceContract(SessionMode:=SessionMode Allowed)s Public Interface lMyService <OperationContract(lsTerminating:sFalse)s Sub Initialize () <OperationContract(lslnitiating:sFalse)>s Sub DoSomething() <OperationContract(lsterminating:=True)>
Sub Terminate ()
End Interface You need to change this interface so that:
"Initialize is allowed to be called at any time before Terminate is called.
"DoSomething is allowed to be called only after Initialize is called, and not allowed to be called after Terminate is called. "Terminate will be allowed to be called only after Initialize is called
Which two actions should you perform? (Each correct answer presents part of the solution. Choose two.)

A) Change the ServiceContract attribute of the lMyService interface to the following. ServiceContract(SessionMode:sSessionMode. Required)
B) Change the ServiceContract attribute of the lMyService interface to the following. ServiceContract(SessionMode:sSessionModeAllowed)?
C) Change the OperationContract attribute of the Initialize operation to the following. OperationContract(lslnitiating: 'True, IsTerminating: 'False)
D) Change the OperationContract attribute of the Terminate operation to the following. OperationContract(Islnitiatings:False, lsTerminating: 'True)

3. You are developing a Windows Communication Foundation (WCF) service.
You need to enable security auditing for all events.
What should you do?

A) Set the serviceAuthorizationAuditLevel setting to SuccessAndFailure and the messageAuthenticationAuditLevel setting to SuccessAndFailure.
B) Set the messageAuthenticationAuditLevel setting to Success and the auditLogLocation setting to Application.
C) Set the serviceAuthorizationAuditLevel setting to Success and the messageAuthenticationAuditLevel setting to Success.
D) Set the messageAuthenticationAuditLevel setting to SuccessAndFailure and the auditLogLocation setting to Security.

4. A Windows Communication Foundation (WCF) service that handles corporate accounting must be changed to comply with government regulations of auditing and accountability
You need to configure the WCF service to execute under the Windows logged-on identity of the calling application.
What should you do?

A) Within the service configuration, add a ServiceAuthenticationManager behavior to the service, and set ServiceAuthenticationManagerType to Impersonate.
B) Within the service configuration, add a serviceSecurityAudit behavior to the service, and set serviceAuthorizationAuditLevel to SuccessOrFailure
C) Within the service configuration, add a ServiceAuthorization behavior to the service, and set ImpersonateCallerForAulOperations to true.
D) Within the service configuration, add a ServiceCredentials behavior to the service, and set type to Impersonate

5. You are developing a client application that uses the following code to consume a Windows
Communication Foundation (WCF) service. (Line numbers are included for reference only.)
01 Dim myBinding As BasicHttpBinding =
New BasicHttpBinding()
02 Dim myEndpointAddress As EndpointAddress =
New EndpointAddress(
"http://contoso.com/TaxService.svc")
04 Dim client As ITaxService =
channelFactory.CreateChannel()
05 Dim data As String = client.GetData(1)
You need to consume the service.
Which code segment should you insert at line 03?

A) channelFactory =
New ChannelFactory(Of ITaxService)
("http://contoso.com/TaxService.svc")
B) Dim channelFactory =
New ChannelFactory(Of ITaxService)
(myBinding, myEndpointAddress)
C) Dim channelFactory =
New ChannelFactory(Of ITaxService)(myBinding)
D) Dim channelFactory =
New ChannelFactory(Of ITaxService)()

Solutions: