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

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

2. You have an existing Windows Communication Foundation (WCF) Web service. The Web service is not responding to messages larger than 64 KB.
You need to ensure that the Web service can accept messages larger than 64 KB without generating errors.
What should you do?

A) Increase the value of maxBufferPoolSize on the endpoint binding.
B) Increase the value of maxRequestLength on the httpRuntime element.
C) Increase the value of maxBufferSize on the endpoint binding.
D) Increase the value of maxReceivedMessageSize on the endpoint binding.

3. You are developing a Windows Communication Foundation (WCF) service. One of the service operations contains the following code.

You need to set a service behavior that prevents two or more threads from incrementing the counter variable at the same time.
Which code segment should you use to set the service behavior?

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

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

5. You are creating an application using Visual Studio 2010. The application consumes a Windows Communication Foundation (WCF) service.
You are adding a service reference to the WCF service.
You need to ensure that the generated proxy does not block the calling thread when executing a service method.
What should you do when adding the service reference?

A) Select the Generate asynchronous operations option.
B) Select the Reuse types in all referenced assemblies option.
C) Set the Collection type to ObservableCollection.
D) Select the Always generate message contracts option.

Solutions: