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1 A Windows Communication Foundation （WCF） solution exposes the following contract over an HTTP connection. Function GetData（） As String End Interface Existing clients are making blocking calls to GetData. Calls to GetData take five seconds to complete. You need to allow new clients to issue non-blocking calls to get the data， without breaking any existing clients. What should you do？（）

2 Windows Communication Foundation （WCF） application uses a data contract that has several data members. You need the application to throw a Serialization Exception if any of the data members are not present when a serialized instance of the data contract is deserialized. What should you do？（）

3 You are creating a Windows Communication Foundation （WCF） service that implements the following service contract. Public Interface IOrderProcessing Sub ApproveOrder（ByVal id As Integer）For interactive and self-paced preparation of exam 70-513， try our practice exams. Practice exams also include self assessment and reporting features!End Interface You need to ensure that only users with the Manager role can call the ApproveOrder method. What should you do？（）

4 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？（）

5 You are creating a Windows Communication Foundation （WCF） service that accepts messages from clients when they are started. The message is defined as follows. [MessageContract] public class Agent { public string CodeName { get； set； }public string SecretHandshake { get； set； } } You have the following requirements： "The CodeName property must be sent in clear text. The service must be able to verify that the property value was not changed after being sent by the client. "The SecretHandshake property must not be sent in clear text and must be readable by the service. What should you do？（）

MCPDMCPD(70-513)單項選擇題每日一練(2019.01.19)