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

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

2. You are developing a Windows Communication Foundation (WCF) service. The service configuration file has a <System.Diagnostics> element defined.
You need to ensure that all security audit information, trace logging, and message logging failures are recorded.
Which configuration segment should you add to the <System.Diagnostics> element?

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

3. A Windows Communication Foundation (WCF) client configuration file contains the following XML segment in the system.serviceModel element.
<client>
<endpoint address=" net.tcp://server/ContosoService "
binding=" netTcpBinding "
contract=" Contoso. IContoso Service "
name=" netTcp " / >
<endpoint address=" net.pipe://localhost/ContosoService "
binding=" netNamedPipeBinding "
contract=" Contoso. IContoso Service "
name=" netPipe " />
</client>
You need to create a channel factory that can send messages to the endpoint listening at net.pipe://localhost/ContosoService.
Which code segment should you use

A) Dim factory As ChannelFactory (Of Contoso. IContosoService ) =
New ChannelFactory (Of Contoso. IContosoService )(
" net.pipe://localhost/ContosoService ")
B) Dim factory As ChannelFactory (Of Contoso. IContosoService ) =
New ChannelFactory (Of Contoso. IContosoService )(" Contoso. IContosoService ")
C) Dim factory As ChannelFactory (Of Contoso. IContosoService ) =
New ChannelFactory (Of Contoso. IContosoService )(" netNamedPipeBinding ")
D) Dim factory As ChannelFactory (Of Contoso. IContosoService ) =
New ChannelFactory (Of Contoso. IContosoService )(" netPipe ")

4. 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.
<FaultContract(GetType(FaultException(CX Order)))>
Replace line 11 with the following line.
Throw New FaultException(CX Order)(
anOrder, "Divide by zero exception")
D) After line 05, add the following line.
'cFaultContract(GetType(FautException(Of Order)))>
Replace line 11 with the following line.
Throw ex

5. You are creating a windows Communication Foundation (WCF) service to process orders. The data contract for the order is defined as follows:
[DataContract] public class Order { ... [DataMemberl public string CardHolderName { get; set; [DataMember] public string CreditCardNumber { get; set; } }
You have the following requirements
- Enable the transmission of the contents of Order from the clients to the service. - Ensure that the contents of CreditCardNumber are not sent across the network in clear text. - Ensure that the contents of CreditCardNumber are accessible by the service to process the order.
You need to implement the service to meet these requirements.
What should you do?

A) Implement the CreditCardNumber property getter and setter. In the setter, run the value of the CreditCardNumber through the MD5CryptoServiceProvider class TransformBlock method
B) Convert the DataContract to a MessageContract and set the ProtectionLevel property to SignAndEncrypt
C) Add a DataProtectionPermission attribute to the CreditCardNumber property and set the ProtectData property to true.
D) Change the data type of CreditCardNumber from string to SecureString

Solutions: