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

1. You are developing a new version of an existing message contract named CustomerDetailsVersion1.
The new version of the message contract must add a Department field of type String to the SOAP header.
You create a new class named GustomerDetailsVersion2 that inherits from CustomerDetailsVersion1.
You need to ensure that all client applications can consume the service.
Which code segment should you use?

A) public class CustomerDetailsVersion2 : CustomerDetailsVersion1 { [ MessageHeader( MustUnderstand = false ) ] public string Department; }
B) public class CustomerDetailsVersion2 : CustomerDetailsVersion1 { [MessageHeader(MustUnderstand = true)] public string Department; }
C) [MessageContract]
public class CustomerDetailsVersion2 : CustomerDetailsVersion1
{
[MessageHeader(MustUnderstand = false)]
public string Department;
}
D) [MessageContract]
public class CustomerDetailsVersion2 : CustomerDetailsVersion1
{
[MessageHeader(MustUnderstand = true)]
public string Department;
}

2. You are moving a Windows Communication Foundation (WCF) service into production.
You need to be able to monitor the health of the service. You only want to enable all performance counter instances exposed by the ServiceModelService 4.0.0.0 counter group.
Which element should you add to the system.serviceModel section in the application configuration file?

A) <diagnostics performanceCounters="ServiceOnly" />
B) <diagnostics performanceCounters="All" />
C) <diagnostics wmiProviderEnabled="true" />
D) <diagnostics wmiProviderEnabled="true" performanceCounters="Off" />

3. Windows Communication Foundation (WCF) service will be hosted in Microsoft Intemnet Information Services (uS).
You create a new application in uS to host this service and copy the service DLL to the bin directory of the application.
You need to complete the deployment of this service to uS. What should you do next?

A) Create an .asmx file and add a @Register directive to this file. Copy the file to the bin directory of the application.
B) Create a .svc file and add a @Register directive to this file. Copy the file to the bin directory of the application.
C) Create an asmx file and add a @ServiceHost directive to this file. Copy the file to the root of the application directory.
D) Create a svc file and add a @ServiceHost directive to this file Copy the file to the root of the application directory.

4. A Windows Communication Foundation (WCF) service is self-hosted in a console application.
The service implements the IDataAccess contract, which is defined in the MyApplication namespace.
The service is implemented in a class named DataAccessService, which implements the IDataAccess interface and also is defined in the MyApplication namespace.
The hosting code is as follows. (Line numbers are included for reference only.)
01 static void Main(string[] args)
02 {
03 ServiceHost host;
05 host.Open();
06 Console.ReadLine();
07 host.Close();
08 }
You need to create a ServiceHost instance and assign it to the host variable. You also need to instantiate the service host.
Which line of code should you insert at line 04?

A) host = new ServiceHost(typeof(DataAccessService));
B) host = new ServiceHost("MyApplication.IDataAccess");
C) host = new ServiceHost(typeof(IDataAccess));
D) host = new ServiceHost("MyApplication.DataAccessService");

5. You are creating a Windows Communication Foundation (WCF) service.
You need to ensure that the service is compatible with ASP.NET to make use of the session state.
Which binding should you use?

A) BasicHttpContextBinding
B) NetTcp ContextBinding
C) NetMsmqBinding
D) NetTcp Binding

Solutions: