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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. You do not want to expose the internal implementation at the service layer.
You need to expose the following class as a service named Arithmetic with an operation named Sum.
Public Class Calculator Public Function Add (ByVal x As Integer, ByVal y As Integer) As Integer End Function End Class Which code segment should you use?

A) <ServiceContract(Name:="Arithmetic")> Public Class Calculator <OperationContract(ReplyAction:="Sum")> Public Function Add(ByVal x As Integer, ByVal y As Integer) As Integer End Function End Class
B) <ServiceContract(Name:="Arithmetic")> Public Class Calculator <OperationContract(Name:="Sum")> Public Function Add(ByVal x As Integer, ByVal y As Integer) As Integer End Function End Class
C) <ServiceContract(Namespace:="Arithmetic")> Public Class Calculator <OperationContract(Action:="Sum")> Public Function Add(ByVal x As Integer, ByVal y As Integer) As Integer End Function End Class
D) <ServiceContract(ConfigurationName:="Arithmetic")> Public Class Calculator <OperationContract(Action:="Sum")> Public Function Add(ByVal x As Integer, ByVal y As Integer) As Integer End Function End Class

2. You are developing a Windows Communication Foundation (WCF) service.
The service operation takes a customer number as the only argument and returns information about the customer.
The service requires a security token in the header of the message.
You need to create a message contract for the service.
Which code segment should you use?

A) [ServiceContract]
public interface IService
{
[OperationContract]
CustomerInformation GetCustomerInformation(Header header,
int customerNumber);
}
[DataContract]
public class CustomerInformation
{
.......
}
[MessageContract]
public class Header { [MessageHeader] public string SecurityTag;
}
B) [ServiceContract]
public interface IService
{
[OperationContract]
CustomerInformation GetCustomerInformation(
CustomerNumber request);
}
[MessageContract]
public class CustomerInformation
{
......
}
[MessageContract] public class CustomerNumber
{
[MessageHeader]
public string SecurityTag;
[MessageBodyMember]
public int CustomerNumberElement;
}
C) [ServiceContract]
public interface IService {
[OperationContract]
CustomerInformation GetCustomerInformation( CustomerNumber request);
}
[DataContract]
public class CustomerInformation { } [MessageContract] public class CustomerNumber {
[MessageHeader]
public string SecurityTag; [MessageBodyMember] public int CustomerNumberElement; }
D) [ServiceContract]
public interface IService
{ [OperationContract]
CustomerInformation GetCustomerInformation(Header header,
int customerNumber);
} [MessageContract] public class CustomerInformation { } [MessageContract] public class
Header { [MessageHeader] public string SecurityTag; }

3. You develop a Windows Communication Foundation (WCF) service that interacts with Microsoft Message Queuing (MSMQ).
The service requires sessions. You need to create a custom binding that enables messages sent to the queue to be viewed when you are using a listener tool.
Which binding elements should you use?

A) msmqIntegrationTransport and textMessageEncoding in this order
B) msmqTransport and textMessageEncoding in this order
C) textMessageEncoding and msmqTransport in this order
D) textMessageEncoding and msmqIntegrationTransport in this order

4. You are implementing a Windows Communication Foundation (WCF) service contract named IContosoService in a class named ContosoService. The service occasionally fails due to an exception being thrown at the service.
You need to send the stack trace of any unhandled exceptions to clients as a fault message.
What should you do?

A) For each OperationContract exposed by IContosoService, apply the following attribute.
[FaultContract(typeof(Exception))]
B) In the application configuration file on the client, add the following XML segment to the
system.serviceModel/behaviors configuration section group.
<endpointBehaviors>
<behavior name=" debug ">
< callback Debug includeExceptionDetailInFaults="true" />
</behavior>
</endpointBehaviors>
Associate the debug behavior with any endpoints that need to return exception details.
C) In the application configuration file on the service and all the clients, add the following
XML segment to the system.diagnostics/sources configuration section group.
<source name="System.ServiceModel" switchValue="Error" propagateActivity="true">
<listeners>
<add name="ServiceModelTraceListener"
initializeData="app_tracelog.svclog"
type="System.Diagnostics.XmlWriterTraceListener" />
</listeners>
</source>
D) Apply the following attribute to the ContosoService class.
[ServiceBehavior(IncludeExceptionDetailInFaults = true)]

5. You are creating an ASP NET web application that hosts several Windows Communication Foundation (WCF) services the services have ASP.NET Compatibility Mode enabled.
Users authenticate with the Web application by using a cookie-based ASR NET Forms Authentication model. You add a service tile named Authentication. svc that contains the following code segment
<%@ SenviceHost Servicee"System
Web Application Services Authentication Service"Factory="System.Web.ApplicationServices.AppicationServicesHostFactory' %>.
You need to ensure that users can access the WCF services without having to re-authenticate.
Which two configuration settings should you add? (Each is part of a complete solution. Choose two.)

A) In the system web.extensions/scripting/webServices/authenticationService element, set the enabled attribute to true.
B) Add a service endpoint with basicHttpBinding for the contract System.WebApplicationServices.AuthenticationService.
C) In the system web.extensions/scripting/webServices/profileService element, set the enabled attribute to true.
D) Add a custom service behavior named AuthenticationServiceTypeBehaviors with a serviceAuthenticationManager element that has serviceAuthenticationManagerType set to System Web Security. SQL Membership Provider

Solutions: