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

1. You are configuring a routing service to call a target service. The routing service has no knowledge of the target service's data types other than the service contract.
The operation contract for all of the methods of the target service specifies IsOneWay=true.
You need to specify the endpoint information for the routing service.
What should you do?

A) In the routing service configuration file, specify "*" for the client endpoint contract and System.ServiceModel.Routing.IRequestReplyRouter for the service endpoint contract.
B) In the target service configuration file, specify "*" for the client endpoint contract and "*" for the service endpoint contract.
C) In the routing service configuration file, specify "*" for the client endpoint contract and "*" for the service endpoint contract.
D) In the routing service configuration file, specify "*" for the client endpoint contract and System.ServiceModel.Routing.ISimplexDatagramRouter for the service endpoint contract.

2. You want to debug the Windows Communication Foundation (WCF) client and server interaction through message and application tracing.
You need to correlate traces generated on the client and the server.
Which XML segment should you add to the system. diagnostics configuration element in the client and server application configuration file?

A) <sources>
<source names"System. ServiceModel" switchValues'VerboseActivityTracing"> <listeners>
<add namee"ServiceModelTraceListener" /> </listeners> </source>
</sources>
B) <sources> <source propagate Activitye'true" namee"System Service Model"
switchValues'Warning, ActivityTracing'> <listeners
<add namez"ServiceModelTraceListener" /> </listeners>
</source> </sources>
C) <sources> <source names" System ServiceModel. MessageLogging"
switchValuee"Verbose"> <listeners>
<add namez"ServiceModelTraceListener" /> <Listeners>
</source> </sources>
D) <sources>
<source names"System. ServiceModeiMessageLogging" propagateActivitye'true" switch Values' Warning, ActivityTracing'5 <listeners> <add name="ServiceModelTraceListener" I> </listeners> </source> </sources>

3. You are modifying an existing Windows Communication Foundation (WCF) service that is defined as follows;

SubmitOrder makes a call to another service.
The ProcessMessage method does not perform as expected under a heavy load you need to enable processing of multiple messages.
New messages must only be processed when the ProcessMessage method is not processing requests, or when it is waiting for calls to SubmitOrder to return.
Which attribute should you apply to the MessageProcessor class?

A) ServiceBehavior (ConcurrencyMode ConcurrencyMode Multiple)
B) CallbackBehavior (ConcurrencyMode:=ConcurrencyModeMuttiple)
C) ServiceBehavior (Conc urrencyMode: =Conc urrencyMode. Reentrant)
D) CallbackBehavior (ConcurrencyMode: ConcurrencyMode Reentrant)

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

5. A class named TestService implements the following interface.
[ServiceContract]
public interface lTestService {
[OperationContract]
DateTime GetServiceTime;
}
TestService is hosted in an ASP.NET application.
You need to modify the application to allow the GetServiceTime method to return the data formatted as JSON.
It must do this only when the request URL ends in /ServiceTime.
What should you do?

A) Add this attribute to the GetServiceTime method.
[Weblnvoke(MetMode"POST")]
In the web.config file, add this element to
system.serviceModel/behaviors/endpointBehaviors.
<behavior namee"Json">
<enableWebScript />
</behavior>
In the web.config file, configure TestService in the system.serviceModel/services collection
as follows
<service namez"TestService">
<endpoint address"/ServiceTime"
contracts"TestService"
behaviorConfiguration="Json"
bindingz"webHttpBinding" />
</service>
B) Add this attribute to the GetServiceTime method.
[WebInvoke(Method = "GET',
UriTemplate "/ServiceTime",
ResponseFormat = WebMessageFormat.Json)]
In the web.config file, configure TestService in the system.serviceModel/services collection
as follows.
<service namez"TestService">
<endpoint address="/ServiceTime"
contract="TestService"
bindinge"webHttpBinding" />
</service>
C) Add this attribute to the GetServiceTime method
[WebGet(
ResponseFormat= WebMessageFormat.Json,
UriTemplatee="/ServiceTime")]
Create a new svc file named JsonVersion.svc with the following content.
<%@ ServiceHost Service"TestService'
Factorye="System.ServiceMode.ActivationWebServiceHostFactory" %>
D) Add this attribute to the GetServiceTime method.
[WebGet(UriTemplate = (Uson)/ServiceTime")]
Create a new .svc file named Jsonversion svc with the following content
<%@ ServiceHost Servicee"TestService"
Factory="System ServiceModel.ActivationWebServiceHostFactory" %>

Solutions:

Question # 1 Answer: D

Question # 2 Answer: B

Question # 3 Answer: D

Question # 4 Answer: A

Question # 5 Answer: C