DRAG DROP
You use Visual Studio to develop a Windows Communication Foundation (WCF) service. The service is not hosted.
You cannot use the WcfTestClient.exe tool to test the service.
You need to test the service from a separate Visual Studio solution that contains a simple console application.
Which four actions should you perform in sequence? (To answer, move the appropriate four actions from the list of actions to the answer area and arrange them in the correct order.)

You are creating a client application and configuring it to call a Windows Communication Foundation (WCF) service. When the application is deployed, it will be configured to send all messages to a WCF routing service.
You need to ensure that the application can consume the target service after the application is deployed.
What should you do?

• A. In the client application, add a service reference to the router service. In the client binding configuration, specify the address of the router service.
• B. In the client application, add a service reference to the target service. In the client binding configuration, specify the address of the target service.
• C. In the client application, add a service reference to the router service. In the client binding configuration, specify the address of the target service.
• D. In the client application, add a service reference to the target service. In the client binding configuration, specify the address of the router service.

A WCF service code is implemented as follows. (Line numbers are included for reference only.)
01 [ServiceContract] 02 [ServiceBehavior(InstanceContextMode = 03 InstanceConcextMode.Single)]
04 public class CalculatorService
05 {
06 [OperacionContract]
07 public double Calculate(double opl, string op, double op2)
08 {
...
24 }
25 }
You need to decrease the response time of the service.
What are two possible ways to achieve this goal? (Each correct answer presents a complete solution. Choose two.)

• A. Require the clients to use async operations when calling the service.
• B. Change the service behavior to the following.
  [ServiceBehavior(
  InstanceContextMode = InstanceContextMode.Single, ConcurrencyMode =
  ConcurrencyMode.Multiple) ]
• C. Change the service behavior to the following.
  [ServiceBehavior(InstanceContextMode = InstanceContextMode.PerCall) ]
• D. Require the clients use threads, the Parallel Task Library, or other mechanism to issue
  service calls in parallel.

You are maintaining a Windows Communication Foundation (WCF) service that uses a custom UserNamePassword class to authenticate clients. The service certificate is hosted in the deployment server store for trusted root certificate authorities and has a Subject value of TaxServiceKey. Other service certificates hosted on the server also use TaxServiceKey as a Subject value.
You need to ensure that the service identifies itself with a certificate whose subject name and distinguished names are TaxServiceKey.
Which code segment should you use?

• A. HostInstance.Credentials.ServiceCertificate.SetCertificate( StoreLocation.LocalMachine, StoreName.Root, X509FindType.FindBySubjectDistinguishedName, "CN=TaxServiceKey");
• B. HostInstance.Credentials.ServiceCertificate.SetCertificate( StoreLocation.LocalMachine, StoreName.My, X509FindType.FindBySubjectName, "CN=TaxServiceKey");
• C. HostInstance.Credentials.ServiceCertificate.SetCertificate( StoreLocation.LocalMachine, StoreName.AuthRoot, X509FindType.FindBySubjectName, "CN=TaxServiceKey");
• D. HostInstance.Credentials.ServiceCertificate.SetCertificate( StoreLocation.LocalMachine, StoreName.My, X509FindType.FindBySubjectDistinguishedName, "CN=TaxServiceKey");

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?

• A. Set the lsRequired property of each data member to true.
• B. Add the Known Type attribute to the data contract.
  Set the Order property of each data member to unique integer value.
• C. Add the Known Type attribute to the data contract.
  Set a default value in each of the data member declarations.
• D. Set the Emit Default Value property of each data member to false.