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Microsoft TS: Microsoft .NET Framework 3.5 C Windows Communication Foundation Sample Questions:

1. 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.)

A) [ServiceBehavior(ConcurrencyMode=ConcurrencyMode.Multiple,
InstanceContextMode=InstanceContextMode.PerSession)]
public class serviceImpl : MyService
{
public void DoSomething(){ }
}
B) [ServiceBehavior(ConcurrencyMode=ConcurrencyMode.Multiple,
InstanceContextMode=InstanceContextMode.PerCall)]
public class serviceImpl : MyService
{
public void DoSomething(){ }
}
C) [ServiceBehavior(ConcurrencyMode=ConcurrencyMode.Single,
InstanceContextMode=InstanceContextMode.Single)]
public class serviceImpl : MyService
{
public void DoSomething(){ }
}
D) [ServiceBehavior(ConcurrencyMode=ConcurrencyMode.Multiple,
InstanceContextMode=InstanceContextMode.Single)]
public class serviceImpl : MyService
{
public void DoSomething(){ }
}

2. You are creating a Windows Communication Foundation service by using Microsoft .NET Framework 3.5. You have successfully created two interfaces: IMyService and IMyServiceClient.
You need to ensure that the service is able to call methods from the client application by using the IMyServiceClient interface.
Which code segment should you use?

A) Option A
B) Option D
C) Option B
D) Option C

3. You create a Windows Communication Foundation service by using Microsoft .NET Framework 3.5. You set up tracing for the service. The tracing fails because of an error in the service configuration. You need to identify the cause of the error.
What should you do?

A) Examine the security event log.
B) Set the enableLogKnownPii attribute to true in the machine, config file.
C) Examine the application event log.
D) Examine the system event log.

4. You are creating a Windows Communication Foundation (WCF) service by using Microsoft .NET Framework 3.5.
You create an instance of the ServerHost class. You plan to host the WCF service in a Windows service.
You need to link the lifetime of the WCF service to the lifetime of the Windows service.
Which three actions should you perform on the instance of the ServerHost class? (Each correct answer presents part of the solution. Choose three.)

A) Subscribe to the Faulted event.
B) Override the RequestAdditionalTime method.
C) Override the OnStart method.
D) Override the InitializeLifetimeService method.
E) Override the OnStop method.
F) Override the GetLifetimeService method.

5. You are creating a Windows Communication Foundation (WCF) service by using Microsoft .NET Framework 3.5. The WCF service will validate certificates to authorize client applications. You write the following code segment.
Class Store Implements IStore Public Sub RemoveOrder(ByVal ordered As Integer) Implements IStore.RemoveOrder End Sub
End Class
You need to ensure that only those client applications that meet the following criteria can access the RemoveOrder method:
What should you do?

A) Option A
B) Option D
C) Option B
D) Option C

Solutions: