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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 developing an application that performs file backups in the background.
The background application will host a Windows Communication Foundation (WCF) service and must be active as soon as the machine is running. The background application will not have a user interface. A front-end application will consume the WCF service and will provide the user interface.
You need to choose a host environment for the WCF service.
Which hosting environment should you choose?

A) Microsoft Internet Information Services (IIS) 6.0
B) a Windows Forms application
C) Windows Process Activation Services (WAS)
D) a Windows Service

2. A Windows Communication Foundation (WCF) service listens for messages at net
tcpilwwwcontoso.comMMyService.
It has a logical address at http/Iwwwcontosocorn)MyService
The configuration for the WCF client is as follows
<endpoint addressrhTttpllwwwcontosocom/MyService"
bindinge"netTc pBinding"
bindingConfiguraton-NetTc pBinding_lMyService
contract="ServiceReference 1. IMyServce'
name='NetTcpBinding_lllyService"/>v
The generated configuration does not provide enough information for the client to communicate with the server.
You need to update the client so that it can communicate with the server what should you do

A) After instantiating the client and before invoking any service operation, add this line of code. client. Endpoint BehaviorsAdd( new Client ViaBehavior( new Uhcnet.tc pifwww.contoso. comiIMyService)))
B) In the client configuration. Change the value of the address attribute to nettcp:/Iwwwcontosocom/MyService
C) After instantiating the client and before invoking any service operation, add this line of code client Endpoint BehaviorsAdd( new EndpointDiscoveryBehawior0{ Enabled true });
D) In the client configuration, change the value of the address attribute to net.tcp:Ilwwwcontosocom/MyServicellisten=http:/Iwwwcontosocom/MyService.

3. A service implements the following contract. (Line numbers are included for reference only.)

The service is implemented as follows.

ContosoService uses NetMsmqBinding to listen for messages. The queue was set up to use transactions for adding and removing messages.
You need to ensure that OperationOne and OperationTwo execute under the same transaction context when they are invoked in the same session.
What should you do?

A) Add the following XML segment to the application config file in the
system.serviceModel/bindings configuration section.
<netMsmqBinding>
<binding name="contosoTx" durable="true" receiveContextEnabled="true" />
</netMsmqBinding>
Then use the NetMsmqBinding named contosoTx to listen for messages from the clients.
B) Insert the following attribute to OperationOne on ContosoService.
<OperationBehavior(
TransactionScopeRequired:=True,
TransactionAutoComplete:=False)>
Insert the following attribute to OperationTwo on ContosoService.
<OperationBehavior
(TransactionScopeRequired:=True,
TransactionAutoComplete:=True)>
C) Add the following XML segment to the application config file in the
system.serviceModel/bindings configuration section.
<customBinding>
<binding name="contosoTx">
<transactionFlow />
<binaryMessageEncoding />
<msmqTransport durable="true" />
</binding>
</customBinding>
Then use the CustomBinding named contosoTx to listen for messages from the clients.
D) Insert the following attribute to OperationOne on IContosoService.
<TransactionFlow(TransactionFlowOption.Mandatory)>
Insert the following attribute to OperationTwo on IContosoService.
<TransactionFlow(TransactionFlowOption.Mandatory)>

4. You are developing a Windows Communication Foundation (WCF) service. The service needs to access out-of-process resources.
You need to ensure that the service accesses these resources on behalf of the originating caller.
What should you do?

A) Set the value of ServiceSecurityContext.Current.WindowsIdentity.ImpersonationLevel to TokenImpersonationLevel.Delegation.
B) Set the PrincipalPermissionAttribute on the service contract and update the binding attribute in the endpoint element of the configuration file to wsHttpBinding.
C) Set the value of ServiceSecurityContext.Current.WindowsIdentity.ImpersonationLevel to TokenImpersonationLevel.Impersonation.
D) Set the PrincipalPermissionAttribute on the service contract and update the bindingConfiguration attribute in the endpoint element of the configuration file to wsHttpBinding.

5. A WCF service code is implemented as follows. (Line numbers are included for reference only.)
01 [ServiceContract] 02 [ServiceBehavior(InstanceContextMode = 03 InstanceConcextMode.Single)]
04 public class CalculatorService
05 {
06 [OperacionContract]
07 public double Calculate(double opl, string op, double op2)
08 {
...
24 }
25 }
You need to decrease the response time of the service.
What are two possible ways to achieve this goal? (Each correct answer presents a complete solution. Choose two.)

A) Change the service behavior to the following.
[ServiceBehavior(
InstanceContextMode = InstanceContextMode.Single, ConcurrencyMode =
ConcurrencyMode.Multiple) ]
B) Change the service behavior to the following.
[ServiceBehavior(InstanceContextMode = InstanceContextMode.PerCall) ]
C) Require the clients to use async operations when calling the service.
D) Require the clients use threads, the Parallel Task Library, or other mechanism to issue
service calls in parallel.

Solutions: