A Windows Communication Foundation （WCF） service exposes two operations： OpA and OpB. OpA needs to execute under the client’s identity， and OpB needs to execute under the service’s identity. You need to configure the service to run the operations under the correct identity. What should you do？（）

来源：考试资料网2018-07-26

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？（）

来源：考试资料网2018-07-26

You are creating a Windows Communication Foundation （WCF） service that implements operations in a RESTful manner.You need to add a delete operation. You implement the delete method as follows. string void DeleteItems（string id）；You need to configure WCF to call this method when the client calls the service with the HTTP DELETE operation. What should you do？（）

来源：考试资料网2018-07-26

A WCF service code is implemented as follows. （Line numbers are included for reference only.） For interactive and self-paced preparation of exam 70-513， try our practice exams. Practice exams also include self assessment and reporting features! 01  02 03InstanceContextMode：=InstanceContextMode.Single）> 04Public Class CalculatorService 0506 07Public Function Calculate（ByVal op1 As Double， 08ByVal op As String， ByVal op2 As Double） As Double …  24End Function 25 26End Class You need to increase the rate by which clients get the required response from the service. What are two possible ways to achieve this goal？ （）

来源：考试资料网2018-07-26

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？（） 

来源：考试资料网2018-07-26