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

1. A Windows Communication Foundation (WCF) service has a callback contract. You are developing a client application that will call this service.
You must ensure that the client application can interact with the WCF service.
What should you do?

A) On the OperationContractAttribute, set the ReplyAction property value to the endpoint address of the client.
B) On the client, create a proxy derived from DuplexClientBase<TChannel>.
C) On the client, use GetCallbackChannel<T>.
D) On the OperationContractAttribute, set the AsyncPattern property value to true.

2. You develop a Windows Communication Foundation (WCF) service.
You name the service MovieService in the Movie namespace. The service is hosted in Microsoft Internet Information Services (IIS).
You copy the assembly containing the service to the bin folder in the virtual directory path.
You need to set up the URI that is mapped to the service.
What should you do?

A) Add the following code segment to the web.config file.
<serviceHostingEnvironment>
<serviceActivations>
odd relativeAddress="./Movie" service="Movie.MovieService"/>
</serviceAct ivations>
</serviceHostingEnvironment>
B) Add a Movie.svc file in the root of the virtual path with the following line.
<%8ServiceHost language="C#" Service="MovieService"*>
C) Add a Movie.svc file in the root of the virtual path with the following line.
<%8ServiceHost language="C#" Service="MovieService.svc"%>
D) Add the following code segment to the web.config file.
<serviceHostingEnvironment>
<serviceActivations>
odd relativeAddress=" . /Movie, svc" service="Hovie.MovieService"/>
</serviceActivations>
</serviceHostingEnvirorunent>

3. You create a Windows Communication Foundation (WCF) service and deploy it with wsHttpBinding and message security enabled.
You create an intermediate WCF service for logging messages sent to the primary service. The intermediate service is called via the clientVia endpoint behavior.
The primary service is receiving malformed data from a client application.
You need to enable inspection of the malformed data and prevent message tampering.
What should you do?

A) Modify the binding on the intermediate service to use netNamedPipeBinding.
B) Specify a protection level of Sign in the service contract for the intermediate service. Disable transport security from the client application configuration file.
C) Modify the binding on the intermediate service to use webHttpBinding.
D) Specify a protection level of None in the service contract for the intermediate service. Disable message and transport security from the client application configuration file.

4. You are developing a Windows Communication Foundation (WCF) service that contains the following code segment.
[ServiceContract ] public interface ICustomerService { & }
public class CustomerService : ICustomerService { & }
The service is self-hosted in a console application. Older client applications access the service at http://contoso.com:8080/CustomerService/V1. Newer client applications access the service at http://contoso.com:8080/CustomerService/V2.
You need to ensure that any client application can access the service at either address.
Which code segment should you use?

A) Uri serviceAddress1 =
new Uri("http://contoso.com:8080/CustomerService/V1");
Uri serviceAddress2 =
new Uri("http://contoso.com:8080/CustomerService/V2");
ServiceHost host =
new ServiceHost(typeof(ICustomerService),
new Uri[] { serviceAddress1, serviceAddress2 });
B) Uri serviceAddress =
new Uri("http://contoso.com:8080/");
ServiceHost host =
new ServiceHost(typeof(CustomerService),
new Uri[] { serviceAddress });
host.AddServiceEndpoint(typeof(ICustomerService),
new BasicHttpBinding(), "CustomerService/V1");
host.AddServiceEndpoint(typeof(ICustomerService),
new BasicHttpBinding(), "CustomerService/V2");
C) Uri serviceAddress =
new Uri("http://contoso.com:8080/");
ServiceHost host =
new ServiceHost(typeof(ICustomerService),
new Uri[] { serviceAddress });
host.AddServiceEndpoint(typeof(CustomerService),
new BasicHttpBinding(), "CustomerService/V1");
host.AddServiceEndpoint(typeof(CustomerService),
new BasicHttpBinding(), "CustomerService/V2");
D) Uri serviceAddress1 =
new Uri("http://contoso.com:8080/CustomerService/V1");
Uri serviceAddress2 =
new Uri("http://contoso.com:8080/CustomerService/V2");
ServiceHost host =
new ServiceHost(typeof(CustomerService),
new Uri[] { serviceAddress1, serviceAddress2 });

5. --- -
You develop a Windows Communication Foundation (WCF) service. Many client applications will consume the service.
You have the following requirements:
You must enable client sessions on the service.
The service must support multi-threaded operations.
If a client application uses sessions, the lifetime of the service instance must be
scoped to the lifetime of the session.
If a client application does not use sessions, the lifetime of the service must be
scoped to the lifetime of a method cal
You need to configure the service.
What should you do? (Each correct answer presents part of the solution. Choose three.)

A) In the ServiceBehavior attribute, set the value of the SessionMode property to SessionMode.Allowed.
B) In the ServiceContract attribute, set the value of the SessionMode property to SessionMode.Allowed.
C) In the ServiceBehavior attribute, set the value of the InstanceContextMode property to InstanceContextMode. PerSession.
D) In the ServiceContract attribute, set the value of the ConcurrencyMode property to ConcurrencyMode.Multiple
E) In the ServiceContract attribute, set the value of the InstanceContextMode property to InstanceContextMode.PerSession.
F) In the ServiceBehavior attribute, set the value of the ConcurrencyMode property to ConcurrencyMode.Multiple

Solutions: