單項選擇題

A Windows Communication Foundation (WCF) application exposes a service as a SOAP endpoint for consumption by cross-platform clients.During integration testing, you find that one of the clients is not generating the correct messages to the WCF application.In order to debug the issue and fix the communication, you need to configure the service to log messages received from the client.What should you do?（）

A. Set an etwTracking behavior on the service and configure a listener for the System.ServiceModel trace source.
B. Set an etwTracking behavior on the service and configure a listener for the System.ServiceModel.MessageLogging trace source.
C. Enable messageLogging in the System.ServiceModel diagnostics element configuration and configure a listener for the System.ServiceModel.MessageLogging trace source.
D. Enable messageLogging in the System.ServiceModel diagnostics element configuration and configure a listener for the System.ServiceModel trace source.

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單項選擇題

You are consuming a Windows Communication Foundation (WCF) service in an ASP. NET Web application.The service interface is defined as follows:[ServiceContract]public interface ICatalog{ [OperationContract] [WebGet(UriTemplate="/Catalog/Items/{id}", ResponseFormat=WebMessageFormat.Json)] string RetrieveItemDescription(int id); } The service is hosted at Catalogsvc.You need to call the service using jQuery to retrieve the description of an item as indicated by a variable named itemId. Which code segment should you use?（）

A. $get(String.format("/Catalogsvc/Catalog/Items/id{0}", itemId) null, function (data) { ... }, javascript");
B. $get(String.format("/Catalogsvc/Catalog/Items/{0}", itemId), null, function (data) { ... }, "json");
C. $get(String.format("/Catalogsvc/Catalog/Items/{0}", itemld), null, function (data) { ... }, "xml");
D. $get(String.format("/Catalogsvc/Catalog/Items/id{0}", itemld), null, function (data) { ... }, "json");

單項選擇題

A Windows Communication Foundation (WCF) service implements the following contract.(Line numbers are included for reference only.)
01 [ServiceContract]
02 public interface IDataAccessService
03 {
04 [OperationContract]
05 void PutMessage(string message);
06 ...
07 [OperationContract]
08 [FaultContract(typeof(TimeoutFaultException))]
09 [FaultContract(typeof(FaultException))]
10 string SearchMessages(string search);
11 }
The implementation of the SearchMessages method throws TimeoutFaultException exceptions for database timeouts.The implementation of the SearchMessages method also throws an Exception for any other issue it encounters while processing the request.These exceptions are received on the client side as generic FaultException exceptions. You need to implement the error handling code for SearchMessages and create a new channel on the client only if the channel faults.What should you do?（）

A. Catch and handle both TimeoutFaultException and FaultException.
B. Catch both TimeoutFaultException and FaultException. Create a new channel in both cases.
C. Catch and handle TimeoutFaultException. Catch FaultException and create a new channel.
D. Catch and handle FaultException. Catch TimeoutFaultException and create a new channel.

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