[单项选择] A client application calls a Windows Communication Foundation (WCF) service with a proxy class that was generated by Visual Studio.The service binding was changed from wsHttpBinding to basicHttpBinding. The method signatures in the service contract are changed.After these changes, the client application receives errors when calling methods on the service.You need to ensure that the client can invoke methods on the service successfully. What should you do?（）
A. Update the configuration file to use basicHttpBinding.
B. Enable anonymous authentication for the service.
C. Copy the configuration file elements under the element from the service back to the client.
D. Update the service reference.

[单项选择] A Windows Communication Foundation (WCF) client uses the following service contract.(Line numbers are included for reference only.) 01 [ServiceContract] 02 public interface IService 03 { 04 [OperationContract] 05 string Operation1（　）; 06 [OperationContract] 07 string Operation2（　）; 08 } You need to ensure that all calls to Operation1 and Operation2 from the client are encrypted and signed. What should you do?（）
A. Set the ProtectionLevel property in line 01 to EncryptAndSign.
B. Set the ProtectionLevel property in line 04 and line 06 to Sign.
C. Add a SecurityCriticalAttribute ror each operation.
D. Add a SecunitySafeCriticalAttribute for each operation.

[单项选择] You are creating a client application and configuring it to call a Windows Communication Foundation (WCF) service.When the application is deployed, it will be configured to send all messages to a WCF routing service. You need to ensure that the application can consume the target service after the application is deployed. What should you do?（）
A. In the client application, add a service reference to the router service. In the client binding configuration, specify the address of the router service.
B. In the client application, add a service reference to the target service. In the client binding configuration, specify the address of the target service.
C. In the client application, add a service reference to the router service. In the client binding configuration, specify the address of the target service.
D. In the client application, add a service reference to the target service. In the client binding configuration, specify the address of the router service.

[单项选择] You are developing a client application that uses the following code to consume a Windows Communication Foundation (WCF) service.(Line numbers are included for reference only.) 01 BasicHttpBinding myBinding = new BasicHttpBinding（　）; 02 EndpointAddress myEndpointAddress = new EndpointAddress("http://contoso.com/TaxService.svc"); 03 ... 04 ITaxService client = channelFactory.CreateChannel（　）; 05 string data = client.GetData(1); You need to consume the service. Which code segment should you insert at line 03?（）
A. var channelFactory = new ChannelFactory();
B. var channelFactory = new ChannelFactory(myBinding);
C. var channelFactory = new ChannelFactory(myBinding, myEndpointAddress);
D. var channelFactory = new ChannelFactory("http://contoso.com/TaxService.svc");

[单项选择] You are developing a client application that consumes a Windows Communication Foundation (WCF) service. The operation contract is as follows. [OperationContract] [FaultContract(typeof(SalesFault))] string GetSales(string saleId);（） The service configuration file contains the following line in the serviceBehaviors section. A divide-by-zero exception is not being handled by the service. You need to ensure that the exception is caught in the client application. Which type of exception should the client catch?（）
A. TimeoutException
B. FaultException
C. DivideByZeroException
D. FaultException

[单项选择] You need to modify a client application that consumes a Windows Communication Foundation (WCF) service. The service metadata is no longer available. You need to modify the previously generated proxy to include asynchronous calls to the service. What should you do? （）
A. Update the service reference with the Generate asynchronous operations option.
B. Create a partial class for the previously generated proxy and include the new asynchronous methods.
C. Create a class with the same name as the previously generated proxy and add the new asynchronous methods. Add the new class to a namespace that is different from the original proxy.
D. Create a class with the same name as the previously generated proxy and add the new asynchronous methods as partial methods. Add the new class to a namespace that is different from the original proxy.

[单项选择] You are debugging a Windows Communication Foundation (WCF) service. The service uses signed and encrypted messages.You need to configure logging so that you can read the contents of the messages. What should you do?（）
A. Set maxSizeMessagesToLog to 10
B. Set logMessageAtServiceLevel to true.
C. Set maxMessagesToLog to 10.
D. Set logMessageAtTransportLevel to true.

[单项选择]You are implementing a Windows Communication Foundation (WCF) client application that consumes the ICatalog and lCatalog2 service interfaces.You need to ensure that the client discovers services implementing these interfaces. The services may already be online or may come online within a 30 second time limit. How should you use WCF Discovery to accomplish this?（）
A. Create one FindCriteria object for each interface and set the Duration of each FindCriteria to 30 seconds. Call the FindAsync method of the DiscoveryClient class twice, one time for each of the FindCriteria objects, to search for the services.
B. Create one FindCriteria object for each interface and set the Duration of each FindCnteria to two seconds. Create a loop that calls the Find method of the DiscoveryClient class to search for the services. Within each loop iteration, call the Find method of the DiscoveryClient class once for each of the FindCriteria objects. Run the loop until a service is found or 30 seconds pass.
C. Create a single FindCriteria object and add both interfaces to its ContractTypeNames collection. Set the criteria's Duration to two seconds. Create a loop that calls the Find method of the DiscoveryClient class to search for the services. Within each loop iteration, call the Find method of the DiscoveryClient class to search for the services Run the loop until a service is found or 30 seconds pass.
D. Create a single FindCritera object and add both interfaces to the ContractTypeNames collection. Set the Duration to 30 seconds and use the FindAsync method of the DiscoveryClient class to search for the services.

[单项选择] You are developing a Windows Communication Foundation (WCF) service that must be discoverable.You need to ensure that the ServiceHost instance supports multiple discovery versions. What should you do?（）
A. - Specify a unique DiscoveryVersion parameter for each endpoint constructor. - Use the same value for the Address property of each endpoint.
B. - Use the endpoint constructor without the DiscoveryVersion parameter. - Use a unique value for the Address property of each endpoint.
C. - Specify a unique DiscoveryVersion parameter for each endpoint constructor. - Use a unique value for the Address property of each endpoint.
D. - Use the endpoint constructor without the DiscoveryVersion parameter. - Use the same value for the Address property of each endpoint.

[单项选择]You are creating a Windows Communication Foundation (WCF) service. You need to ensure that the service is compatible with ASP.NET to make use of the session state. Which binding should you use?（）
A. NetTcpContextBinding
B. BasicHttpContextBinding
C. NetTcpBinding
D. NetMsmqBinding