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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 that implements the following service contract.
<ServiceContract()>
Public Interface IOrderProcessing
<OperationContract()>
Sub ApproveOrder(ByVal id As Integer)
End Interface
You need to ensure that only users with the Manager role can call the ApproveOrder method. What should you do?

A) In the method body, check the Rights.PossessProperty property to see if it contains Manager.
B) Add a PrincipalPermission attribute to the method and set the Roles property to Manager.
C) Add a SecurityPermission attribute to the method and set the SecurityAction to Demand.
D) In the method body, create a new instance of WindowsClaimSet. Use the FindClaims method to locate a claimType named Role with a right named Manager.

2. You are adding a Windows Communication Foundation (WCF) service to an existing application. The application is configured as follows. (Line numbers are included for reference only.)
01 <configuration>
02 <system.serviceModel>
03 <services>
04 <service name="Contoso.Sales.StockService"
behaviorConfiguration="MetadataBehavior">
06 <host>
07 <baseAddresses>
08 <add
baseAddress="http://contoso.com:8080/StockService" />
09 </baseAddresses>
10 </host>
11 </service>
12 </services>
13 <behaviors>
14 <serviceBehaviors>
15 <behavior name="MetadataBehavior">
16 </behavior>
17 </serviceBehaviors>
18 </behaviors>
You need to configure the service to publish the service metadata.
Which two actions should you perform?
(Each correct answer presents part of the solution. Choose two.)

A) Add the following XML segment between lines 10 and 11.
<endpoint address=""
binding="basicHttpBinding"
contract="IMetadataExchange" />
B) Add the following XML segment between lines15 and 16.
<serviceDiscovery>
<announcementEndpoints>
<endpoint address=""/>
</announcementEndpoints>
</serviceDiscovery>
C) Add the following XML segment between lines 15 and 16
<serviceMetadata httpGetEnabled="true"/>
D) Add the following XML segment between lines 10 and 11.
<endpoint address=""
binding="mexHttpBinding"
contract="IMetadataExchange" />

3. You are developing a Windows Communication Foundation (WCF) service. You enable logging in the configuration file. The opening tag is defined as follows.

You need to ensure that logging is implemented so that only messages with SOAP headers are logged.
What should you add to the filters element of the application configuration file?

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

4. You are developing a Windows Communication Foundation (WCF) service that is hosted by a Windows Forms application.
The ServiceHost instance is created in the Form constructor.
You need to ensure that the service is not blocked while the UI thread is busy.
What should you do?

A) Decorate the service implementation class with the following line of code.
[ServiceBehavior(
UseSynchronizationContext = false)]
B) Decorate the service implementation class with the following line of code.
[ServiceBehavior(
ConcurrencyMode = ConcurrencyMode.Multiple)]
C) Call the BeginInvoke method of the form and supply a delegate.
D) Call the Invoke method of the form and supply a delegate.s

5. You are developing a Windows Communication Foundation (WCF) client application. The client application contains the following code.

The configuration file contains the following lines.

You need to ensure that the service is consumed.
Which code segment should you use?

A) var client = new Social Client ("POST") ; client.Endpoint.Behaviors.Add( new WebHttpBehovior());
B) var client = new SocialClient("SocialClient"); c1lent.Endpoint.Behaviors.Add( new WebHttpBehovior());
C) var client = new SocialClient("SocialClient"); client.Endpoint.Behaviors.Add( new WebScriptEnoblingBehovior());
D) var client = new Social Client ("POST"); client.Endpoint.Behaviors.Add( new WebScriptEnoblingBehovior());

Solutions: