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?（）

单项选择题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. Microsoft Internet Information Services (IIS) 6.0
B. Windows Process Activation Services (WAS)
C. A Windows Forms application
D. A Windows Service

单项选择题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>

单项选择题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.

单项选择题You have a Windows Communication Foundation (WCF) service that accepts the following message contract.[MessageContract(WrapperNamespace= http: www.movies.com , ProtectionLevel=ProtectionLevel.None)] public class Ticket{ [MessageBodyMember(Namespace= http: www.movietheater.com , Order=1)] public DateTime ShowTime = DateTime.Now; [MessageBodyMember(Namespace= http: www.movietheater.com )] public string ReservationName = Smith ; [MessageBodyMember(Namespace= http: www.movietheater.com )] public int NumberOfSeats = 0;} You need to ensure that the client sends a SOAP body that is accepted by the service.（）

A.
B.
C.
D.

单项选择题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.