Microsoft 070-513

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

1. A Windows Communication Foundation (WCF) solution uses the following contracts. (Line numbers are included for reference only.)
01 [ServiceContract(CallbackContract = typeof(INameService))]
02 public interface IGreetingService
03 {
04 [OperationContract]
05 string GetMessage();
06 }
08 [ServiceContract]
09 public interface INameService
10 {
11 [OperationContract]
12 string GetName();
13 }
When the client calls GetMessage on the service interface, the service calls GetName on the client callback. In the client, the class NameService implements the callback contract.
The client channel is created as follows.
22 In stanceContext callbackContext =
new InstanceContext(new NameService("client"));
25 DuplexChannelFactory<IGreetingService> factory =
new DuplexChannelFactory<IGreetingService>(
typeof(NameService), binding, address);
26 IGreetingService greetingService = factory.CreateChannel();
You need to ensure that the service callback is processed by the instance of NameService.
What are two possible ways to achieve this goal? (Each correct answer presents a complete solution. Choose two.)

A) Add the following code segment after line 26. callbackContext.OutgoingChannels.Add((IDuplexChannel)greetingService);
B) Change line 25 to the following code segment. DuplexChannelFactory<IGreetingService> factory = new DuplexChannelFactory<IGreetingService>( callbackContext, binding, address);
C) Change line 26 to the following code segment. IGreetingService greetingService = factory.CreateChannel(callbackContext);
D) Add the following code segment after line 26. callbackContext.IncomingChannels.Add((IDuplexChannel)greetingService);

2. 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) 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.
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) Modify the binding on the intermediate service to use netNamedPipeBinding.

3. You develop a Windows Communication Foundation (WCF) service to generate reports. Client applications call the service to initiate report generation but do not wait for the reports to be generated. The service does not provide any status to the client applications.
The service class is defined as follows. (Line numbers are included for reference only.)

You need to ensure that client applications can initiate reports without waiting for status.
Which two actions should you perform (Each correct answer presents part of the solution. Choose two.)

A) Remove line 08. At line 05, change the return type of GenerateReports method to void.
B) Insert the following code at line 04. [OperationContract(IsOneWay=true)]
C) At line 05, change the GenerateReports method from private to public.
D) Insert the following code at line 04. [OperationContract(AsyncPattern=false)]

4. 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) textMessageEncoding and msmqIntegrationTransport in this order
B) textMessageEncoding and msmqTransport in this order
C) msmqIntegrationTransport and textMessageEncoding in this order
D) msmqTransport and textMessageEncoding in this order

5. You are developing a Windows Communication Foundation (WCF) service to provide shopping cart support. ASP.NET compatibility mode is not enabled.
The shopping cart information must be retained across user visits to the store until the user explicitly empties the cart or submits the cart contents to order.
You need to implement the service as a DurableService.
Which two actions should you perform? (Each correct answer presents part of the solution. Choose two.)

A) Use basicHttpBinding for both the client application and the service.
B) Use wsHttpContextBinding for both the client application and the service.
C) Create the persistence provider database and configure the persistenceProvider element of the service behavior to point to that database.
D) In the method to add an item to the shopping cart, serialize the shopping cart contents after adding the current item and storing it in a Session variable.

Solutions: