You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4 to create a Windows Communication Foundation (WCF) Data Services service. The service connects to a Microsoft SQL Server 2008 database. The service is hosted by an Internet Information Services (IIS) 6.0 Web server.
The application works correctly in the development environment. However, when you connect to the service on the production server, attempting to update or delete an entity results in an error. You need to ensure that you can update and delete entities on the production server. What should you do?

• A. Add the following line of code to the InitializeService method of the service. config.SetEntitySetAccessRule ("*",EntitySetRights.WriteDelete | EntitySetRights.WriteMerge);
• B. Add the following line of code to the InitializeService method of the service. config.SetEntitySetAccessRule ("*",EntitySetRights.WriteDelete | EntitySetRights.WriteInsert);
• C. Configure IIS to allow the PUT and DELETE verbs for the .svc Application Extension.
• D. Configure IIS to allow the POST and DELETE verbs for the .svc Application Extension.

You are creating a Windows Communication Foundation (WCF) service to process orders.
The data contract for the order is defined as follows.
[DataContract]
public class Order {
[DataMember] public string CardHolderName { get; set; [DataMember]
public string CreditCardNumber { get; set; }
}
You have the following requirements:
"Enable the transmission of the contents of Order from the clients to the service.
"Ensure that the contents of CreditCardNumber are not sent across the network in clear text.
"Ensure that the contents of CreditCardNumber are accessible by the service to process the order.
You need to implement the service to meet these requirements.
What should you do?

• A. Convert the DataContract to a MessageContract and set the ProtectionLevel property to SignAndEncrypt.
• B. Change the data type of CreditCardNumber from string to SecureString.
• C. Add a DataProtectionPermission attribute to the CreditCardNumber property and set the ProtectData property to true.
• D. Implement the CreditCardNumber property getter and setter. In the setter, run the value of the CreditCardNumber through the MD5CryptoServiceProvider class TransformBlock method.

You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4 to create an application. The
application connects to a Microsoft SQL Server database.
You create the classes shown in the following exhibit.
You add the following code segment to the application. (Line numbers are included for reference only.)
01 public void QueryPlayers(List <League> leagues) {
02
03 }
You create a LINQ query to retrieve a collection of Player objects.
You need to ensure that the collection includes all the players from each team and every league.
Which code segment should you insert at line 02?

• A. var query = leagues.SelectMany(l => l.Teams.Select(t => t.Players));
• B. var query = leagues.Select(l => l.Teams.Select(t => t.Players));
• C. var query = leagues.SelectMany(l => l.Teams.SelectMany(t => t.Players));
• D. var query = leagues.Select(l => l.Teams.SelectMany(t => t.Players));

You are creating a Windows Communication Foundation (WCF) service based on WSHttpBinding. New
audit requirements dictate that callers must be authenticated on every call to ensure that their credentials
have not been revoked.
You need to ensure that the service will not cache the security request token.
What should you do?

• A. In the message security configuration, change clientCredentialType from IssuedToken to UserName.
• B. At the end of every operation, call the SessionStateUtility.RaiseSessionEnd method.
• C. In the message security configuration, set establishSecurityContext to false.
• D. Apply a ServiceBehavior attribute to the service implementation class with the InstanceContextMode property set to Single.