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

1. You are developing a Windows Communication Foundation (WCF) service. The following code defines and implements the service. (Line numbers are included for reference only.)

You need to ensure that two identical copies of the received message are created in the service.
Which code segment should you insert at line 12?

A) Message msgCopy = message;
Message returnMsg = message;
B) MessageBuffer buffer = message.
CreateBufferedCopy(8192);
Message msgCopy = buffer.CreateMessage();
Message returnMsg = buffer.CreateMessage();
C) MessageBuffer buffer = message.
CreateBufferedCopy(8192);
Message msgCopy = buffer.CreateMessage();
Message returnMsg = msgCopy;
D) Message msgCopy = message.
CreateBufferedCopy(8192) as Message;
Message returnMsg = message.
CreateBufferedCopy(8192) as Message;

2. You are developing a Windows Communication Foundation (WCF) service that contains the following service contract.

You need to ensure that RecordPayments can correctly deserialize into an Employee or a Customer object.
What should you do?

A) Add the following KnownType attributes to the Person class. [KnownType(typeof(Employee))] [KnownType(typeof(Customer))]
B) Add the following KnownType attribute to the Employee class and to the Customer class. [KnownType(typeof(Person))]
C) Implement the IExtensibleDataObject interface in the Person class.
D) Implement the IExtension<> interface in the Person class.

3. You are developing an application that performs file backups in the background.
The background application will host a Windows Communication Foundation (WCF) service and must be active as soon as the machine is running. The background application will not have a user interface. A front-end application will consume the WCF service and will provide the user interface.
You need to choose a host environment for the WCF service.
Which hosting environment should you choose?

A) a Windows Forms application
B) Microsoft Internet Information Services (IIS) 6.0
C) Windows Process Activation Services (WAS)
D) a Windows Service

4. A Windows Communication Foundation (WCF) service that handles corporate accounting must be changed to comply with government regulations of auditing and accountability.
You need to configure the WCF service to execute under the Windows logged-on identity of the calling application.
What should you do?

A) Within the service configuration, add a serviceCredentials behavior to the service, and set type to Impersonate.
B) Within the service configuration, add a serviceAuthorization behavior to the service, and set impersonateCallerForAllOperations to true.
C) Within the service configuration, add a serviceSecurityAudit behavior to the service, and set serviceAuthorizationAuditLevel to SuccessOrFailure.
D) Within the service configuration, add a serviceAuthenticationManager behavior to the service, and set serviceAuthenticationManagerType to Impersonate.

5. A Windows Communication Foundation (WCF) service has the following contract.
[ServiceContract(Namespace="http://contoso.com")] public interface IShipping { [OperationContract] string DoWork(int id); }
This is one of several service contracts hosted by your application. All endpoints use SOAP
1.2 bindings with WS-Addressing 1.0. The System.ServiceModel.MessageLogging trace source in the system.diagnostics configuration section is configured with one listener.
You need to make sure that only the messages that are returned from the DoWork operation are logged.
Which XML segment should you add to the system.serviceModel/diagnostics/messageLogging/filters configuration element?

A) <add xmlns:addr="http://www.w3.org/2005/08/addressing"> //addr:Action[text() =
'http://contoso.com/IShipping/DoWork']
</add>
B) <add xmlns:addr="http://www.w3.org/2005/08/addressing"> //addr:Action[text() =
'http://contoso.com/IShipping/DoWorkResponse']
</add>
C) <add xmlns:soap="http://www.w3.org/2003/05/soap-envelope"> //soap:Action[text() =
'http://contoso.com/IShipping/DoWorkResponse']
</add>
D) <add xmlns:soap="http://www.w3.org/2003/05/soap-envelope"> //soap:Action[text() =
'http://contoso.com/IShipping/DoWork']
</add>

Solutions:

Question # 1 Answer: B

Question # 2 Answer: A

Question # 3 Answer: D

Question # 4 Answer: B

Question # 5 Answer: B