You create a Windows Communication Foundation service by using Microsoft .NET Framework 3.5.
You write the following code segment for the service implementation.
(Line numbers are included for reference only.)

01 public void PutMessage(Message msg)
02 {
03 string value=null;
04
05 }

You need to retrieve the content from the received message body and store it in the variable named value.
Which code segment should you insert at line 04?

You are creating a Windows Communication Foundation service by using Microsoft .NET Framework 3.5.
The service contains the following code segment.

[ServiceContract]
public interface IMathSrvc
{
[OperationContract]
void AddNumbers(int num);
[OperationContract]
int Clear();
}

You need to ensure that the service meets the following requirements: The service can call the AddNumbers operation multiple times
The AddNumbers operation must start a session on the initial call. The service must call the Clear operation only if a session exists.
The service must not call other operations after it calls the Clear operation.
Which code segment should you use to replace the existing code segment?

You are creating a distributed application by using Microsoft .NET Framework 3.5.
The application uses the Windows Communication Foundation model.
You need to ensure that the following requirements are met:
User authentication is performed at the message level.
Data protection is performed at the transport level.
Server authentication is performed at the transport level.
What are two possible ways to achieve this goal?
(Each correct answer presents a complete solution. Choose two.)

You create a Windows Communication Foundation (WCF) service by using Microsoft .NET framework 3.5.
You write the following code segment for a service contract.

[ServiceContract]
public interface IOrderManager
{
[OperationContract]
void ProcessOrder(int ordered);
}

You need to ensure that the WCF service meets the following requirements:
The ProcessOrder method uses transactions.
The ProcessOrder method commits automatically if no exception occurs.
Which method implementation should you use?

You are creating a Windows Communication Foundation service by using Microsoft .NET Framework 3.5
The service will be exposed for consumption.
You need to ensure that the service supports interoperability with the broadest possible number of Web Service toolkits.
The service must also support transport-level Security. Which configuration setting should you use?

You are creating a Windows Communication Foundation (WCF) service by using Microsoft .NET Framework 3.5.
The service will authenticate the client applications by using Personal Information Cards.
You write the following code segment. (Line numbers are included for reference only.)

01 public class CustomServiceAuthorizationManager:
02 ServiceAuthorizationManager{
03 protected override bool CheckAccessCore(OperationContext operationContext)
04 {
05 string action = operationContext.RequestContext.RequestMessage.Headers.Action;
06 if (action == "http://tempuri.org/lEnginefUpdate")
07 {
06 foreach (ClaimSet cs in operationContext.ServiceSecurityContext.AuthorizationContext.ClaimSets)
09 {
10
11
12 return false;
13 }
14 return true;
15 }
16 } …
17 bool IsEmailValid(string email)
18 {
19 //e-mail validation is performed here;
20 return true;
21 }

You need to ensure that only those client applications that provide a valid email
address can execute the Update method.
Which code segment should you insert at line 10?

You are creating a Windows Communication Foundation (WCF) client application by using Microsoft .NET Framework 3.5.
The proxy generated for the WCF service results in the following code segment.

[ServiceContract(CallbackContract=typeOf(IStoreCallback))]
public interface IStore
{
[OperationContract(IsOneWay=true)]
void CheckAvailableProducts();
}
public interface IStoreCallback{ }

To implement a callback interface, you create the following class in the client application.
public class StoreCallback: IStoreCallback{ }
The client application receives notifications from the service through the callback interface.
You write the following code segment for the client application to use the generated proxy.
(Line numbers are included for reference only.)

01
02 client.CheckAvailableProducts();

You need to set up duplex communication between the client application and the WCF service.
Which code segment should you insert at line 01?

You are creating a Windows Communication Foundation service by using Microsoft .NET Framework 3.5.
You create the following service contract.

[ServiceContract]
public interface IMyService
{
[OperationContract]
void DoSomething();
}

The service will not use any external resources.
You need to ensure that the calls to the DoSomething operation are thread-safe.
What are the two possible service implementations that you can use to achieve this goal?
(Each correct answer presents a complete solution. Choose two.)