单选题You are building a client for a Windows Communication Foundation (WCF) service. You need to create a proxy to consume this service. Which class should you use?（）A ChannelFactoryBServiceHostC ClientRuntimeD CommunicationObject

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<SalesFault>

You create a service and deploy it on a network in a building named Building1. You will deploy the service to Building2.The service in Building1 is configured using the following discovery scopes.The service in Building2 will be configured using the following discovery scopes.You need to ensure that the client application can discover the service in Building1 or the service in Building2.Which scopes should you add to the client configuration file? （）

A.

B.

C.

D.

You are developing a Windows Communication Foundation (WCF) service.You enable message logging, trace listeners, activity propagation, and tracing on the trace sources.You have the following code segment in the client application. (Line numbers are included for reference only.)01 Guid multiCallActivityId = Guid.NewGuid();02 TraceSource ts = new TraceSource("Multicall");03 Trace.CorrelationManager.ActivityId = multiCallActivityId;04You encounter errors when your client application consumes the service.You need to ensure that your client application can correlate tracing information with the service.Which code segment should you add at line 04?（）

A.

B.

C.

D.

Your Windows Communication Foundation (WCF) client application uses HTTP to communicate with the service.You need to enable message logging and include all security information such as tokens and nonces in logged messages.What should you do?（）

A.

B.

C.

D.

A Windows Communication Foundation (WCF) service only accepts messages that are signed and encrypted. A client application is not receiving expected responses from the service. You need to enable logging to verify that the messages from the client are signed and encrypted. You also need to see what each message looks like before the message body is deserialized into a NET object. What should you do?（）

A.

B.

C.

D.

You are creating an application that consumes a Windows Communication Foundation (WCF) service. The service implements the IService contract. The client application contains the CallbackHandler class, which implements IServiceCallback.You need to ensure that a client proxy is created that can communicate with the service over a duplex channel.Which code segment should you use?（）

A.

B.

C.

D.

You want to debug the Windows Communication Foundation (WCF) client and server interaction through message and application tracing.You need to correlate traces generated on the client and the server. Which XML segment should you add to the system.diagnostics configuration element in the client and server application configuration file?（）

A.

B.

C.

D.

You are developing a Windows Communication Foundation (WCF) service. Client applications require reliable sessions to access the service.Users report that they receive ServerTooBusyException errors when their client application tries to establish a session. You need to ensure that the service can handle a minimum of 30 client connection requests.Which ReliableSessionBindingElement property should you configure?（）

A. MaxRetryCount

B. MaxTransferWindowSize

C. MaxPendingChannels

D. InactivityTimeout

A. AnnouncementService

B. AnnouncementClient

C. DiscoveryClient

D. HttpListener