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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 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 AsyncPattern property value to true.

B. On the OperationContractAttribute, set the ReplyAction property value to the endpoint address of the client.

C. On the client, create a proxy derived from DuplexClientBase<TChannel >.

D. On the client, use GetCallbackChannel<T >.

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 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.

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 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>

A Windows Communication Foundation (WCF) service interacts with the database of a workflow engine. Data access authorization is managed by the database, which raises security exceptions if a user is unauthorized to access it.You need to ensure that the application transmits the exceptions raised by the database to the client that is calling the service.Which behavior should you configure and apply to the service？（）

A.routing

B.service Debug

C.service Security Audit

D.workflow Unhandled Exception

A Windows Communication Foundation (WCF) client application is consuming an RSS syndication feed from a blog.You have a SyndicationFeed variable named feed. The application iterates through the items as follows.(Line numbers are included for reference only.)01 foreach (SyndicationItem item in feed.Items)02 {03 }You need to display the content type and body of every syndication item to the console.Which two lines of code should ou insert between lines 02 and 03？（）

A.

B.

C.

D.