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Microsoft 070-513 Exam Syllabus Topics:

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

1. 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.)

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 lines15 and 16.
< serviceDiscovery >
< announcementEndpoints >
<endpoint address=""/>
</ announcementEndpoints >
</ serviceDiscovery >
B) Add the following XML segment between lines 10 and 11.
<endpoint address= ""
binding= " mexHttpBinding "
contract= " IMetadataExchange "
/>
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= " basic HttpBinding "
contract= " IMetadataExchange " />

2. You are creating a Window s Communication Foundation (WCF) service application. The
application needs to service many clients and requests simultaneously. The application also needs to ensure subsequent individual client requests provide a stateful conversation.
You need to configure the service to support these requirements.
Which attribute should you add to the class that is implementing the service?

A) <ServiceBehavior(InstanceContextMode:=InstanceContextMode.PerCall, ConcurrencyMode:=ConcurrencyMode.Multiple)>
B) <ServiceBehavior(InstanceContextMode:=InstanceContextMode.PerSession, ConcurrencyMode:=ConcurrencyMode.Multiple)>
C) <ServiceBehavior(InstanceContextMode:=InstanceContextMode.PerSession, ConcurrencyMode:=ConcurrencyMode.Single)>
D) <ServiceBehavior(InstanceContextMode:=InstanceContextMode.PerCall, ConcurrencyMode:=ConcurrencyMode.Reentrant)>

3. You are developing a Windows Communication Foundation (WCF) service. The following code defines and implements the service. (Line numbers are included for reference only.)

You need to ensure that two identical copies of the received message are created in the service.
Which code segment should you insert at line 12?

A) Message msgCopy = message;
Message returnMsg = message;
B) MessageBuffer buffer = message.
CreateBufferedCopy(8192);
Message msgCopy = buffer.CreateMessage();
Message returnMsg = msgCopy;
C) MessageBuffer buffer = message.
CreateBufferedCopy(8192);
Message msgCopy = buffer.CreateMessage();
Message returnMsg = buffer.CreateMessage();
D) Message msgCopy = message.
CreateBufferedCopy(8192) as Message;
Message returnMsg = message.
CreateBufferedCopy(8192) as Message;

4. A Windows Communication Foundation (WCF) solution uses the following contracts. (Line numbers are included for reference only.)
01 [ServiceContract(CallbackContract = typeof(INameService))]
02 public interface IGreetingService
03 {
04 [OperationContract]
05 string GetMessage();
06 }
08 [ServiceContract]
09 public interface INameService
10 {
11 [OperationContract]
12 string GetName();
13 }
When the client calls GetMessage on the service interface, the service calls GetName on the client callback. In the client, the class NameService implements the callback contract.
The client channel is created as follows.
22 In stanceContext callbackContext =
new InstanceContext(new NameService("client"));
25 DuplexChannelFactory<IGreetingService> factory =
new DuplexChannelFactory<IGreetingService>(
typeof(NameService), binding, address);
26 IGreetingService greetingService = factory.CreateChannel();
You need to ensure that the service callback is processed by the instance of NameService.
What are two possible ways to achieve this goal? (Each correct answer presents a complete solution. Choose two.)

A) Change line 25 to the following code segment. DuplexChannelFactory<IGreetingService> factory = new DuplexChannelFactory<IGreetingService>( callbackContext, binding, address);
B) Add the following code segment after line 26. callbackContext.OutgoingChannels.Add((IDuplexChannel)greetingService);
C) Change line 26 to the following code segment. IGreetingService greetingService = factory.CreateChannel(callbackContext);
D) Add the following code segment after line 26. callbackContext.IncomingChannels.Add((IDuplexChannel)greetingService);

5. You are developing an application to update a users social status. You need to consume the service using Windows Communication Foundation (WCF).
The client configuration is as follows.
<system.serviceModel>
<bindings>
<webHttpBinding>
<binding name="SocialConfig">
<security mode="TransportCredentialOnly">
<transport clientCredentialType="Basic"
realm="Social API" />
</security>
</binding>
</webHttpBinding>
</bindings>
<client>
<endpoint address= " http:// contoso .com "
binding="webHttpBinding"
bindingConfiguration="SocialConfig"
ontract="ISocialStatus"
name="SocialClient" />
</client>
</system.serviceModel>
The service contract is defined as follows.
<ServiceContract()>
Public Interface ISocialStatus
<OperationContract()>
<WebInvoke(UriTemplate:="/statuses/update.xml?status={text}")>
Sub UpdateStatus(ByVal text As String)
End Interface
Which code segment should you use to update the social status?

A) Using factory As WebChannelFactory(Of ISocialStatus) =
New WebChannelFactory(Of ISocialStatus)("SocialClient")
factory.Credentials.UserName.UserName = user.Name
factory.Credentials.UserName.Password = user.Password
Dim socialChannel As ISocialStatus =
factory.CreateChannel()
socialChannel.UpdateStatus(newStatus)
End Using
B) Using factory As ChannelFactory(Of ISocialStatus) =
New WebChannelFactory(Of ISocialStatus)(GetType(ISocialStatus))
factory.Credentials.UserName.UserName = user.Name
factory.Credentials.UserName.Password = user.Password
Dim socialChannel As ISocialStatus =
factory.CreateChannel() socialChannel.UpdateStatus(newStatus) End Using
C) Using factory As WebChannelFactory(Of ISocialStatus) =
New WebChannelFactory(Of ISocialStatus)(GetType(ISocialClient))
factory.Credentials.Windows.ClientCredential.UserName =
user.Name
factory.Credentials.Windows.ClientCredential.SecurePassword.SetAt(
0, user.Password)
Dim socialChannel As ISocialStatus = factory.CreateChannel()
socialChannel.UpdateStatus(newStatus)
End Using
D) Using factory As ChannelFactory(Of ISocialStatus) =
New ChannelFactory(Of ISocialStatus)("POST")
factory.Credentials.Windows.ClientCredential.UserName =
user.Name
factory.Credentials.Windows.ClientCredential.SecurePassword.SetAt(
0, user.Password)
Dim socialChannel As ISocialStatus = factory.CreateChannel()
socialChannel.UpdateStatus(newStatus)
End Using

Solutions: