You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to create an application that
connects to a database by using the Entity Framework.
You create an Entity Data Model (EDM) by using the Generate from database wizard for the following
tables.

You need to ensure that the EDM contains an entity type named Employee that contains all of the data from
both tables.
What should you do?

• A. Delete the EmployeeAccess entity, create a new property named CanAccessBuildings on the Employee entity, and add a mapping for the new property.
• B. Modify the .edmx file to include the following line of code. <NavigationProperty Name="Type" FromRole="EmployeeAccess" ToRole="Employee" />
• C. Create an inheritance relationship between the Employee and EmployeeAccess entities, and use CanAccessBuildings as an inheritance condition.
• D. Create a one-to-one association named CanAccessBuildingsAssociation between the EmployeeAccess entity and the Employee entity.

You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to develop an application that
uses the EntityFramework.
The application has an entity named Person. A Person instance named person1 and an ObjectContext
instance named model exist.
You need to delete the person1 instance. Which code segment should you use?

• A. model.DeleteObject(person1); model.SaveChanges();
• B. model.ExecuteStoreCommand("Delete", new []{new ObjectParameter("Person", person1)}; model.SaveChanges();
• C. model.ExecuteStoreCommand("Detach", new []{new ObjectParameter("Person", person1)}; model.SaveChanges();
• D. model.Detach(person1); model.SaveChanges();

You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to develop an application that
uses the Entity Framework.
Entity types in the model are generated by the Entity Data Model generator tool (EdmGen.exe).
You write the following code. (Line numbers are included for reference only.)
01 MemoryStream stream = new MemoryStream();
02 var query = context.Contacts.Include("SalesOrderHeaders.SalesOrderDetails");
03 var contact = query.Where("it.LastName = @lastname", new ObjectParameter
("lastname", lastName)).First();
04 ....
You need to serialize the contact and all of its related objects to the MemoryStream so that the contact can
be deserialized back into the model.
Which code segment should you insert at line 04?

• A. var formatter = new XmlSerializer(typeof(Contact), new Type[] { typeof(SalesOrderHeader), typeof(SalesOrderDetail)
  });
  formatter.Serialize(stream, contact);
• B. var formatter = new XmlSerializer(typeof(Contact)); formatter.Serialize(stream, contact);
• C. var formatter = new BinaryFormatter(); formatter.Serialize(stream, contact);
• D. var formatter = new SoapFormatter(); formatter.Serialize(stream, contact);

How do you define a WCF Data Service query to grab the first 10 records. Options are something like:

• A. DataServiceQuery<Order> selectedOrders = context.Orders.AddQueryOption("$filter", "10");
• B. DataServiceQuery<Order> selectedOrders = context.Orders.AddQueryOption("$top", "10");
• C. DataServiceQuery<Order> selectedOrders = context.Orders.AddQueryOption("$expand", "10");
• D. DataServiceQuery<Order> selectedOrders = context.Orders.AddQueryOption("$select", "10");

You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to create a Windows
Communication Foundation (WCF) Data Services service.
WCF Data Services uses an authentication scheme that requires an HTTP request that has the following
header format:
GET /Odata.svc/Products(1)
Authorization: WRAP access_token="123456789"
The application includes the following code. (Line numbers are included for reference only.)
01 public class program
02 {
03 Public void GetProducts()
04 {
05 var proxy = new MyDataServiceContext("...");
06 ...
07 }
08 }
You need to ensure that the correct authentication header is present when requests are made by using
MyDataServiceContext.
What should you do?

• A. Insert the following code segmen at line 06:
  Proxy.SendingRequest += new EventHandler<SendingRequestEventArgs>
  (proxy_SendingRequest);
  Insert the following code segmen at line 09:
  void proxy_SendingRequest(object sender, SendingRequestEventArgs e){
  e.RequestsHeaders.Add("WRAP access_token", "123456789");
  }
• B. Insert the following code segmen at line 06:
  Proxy.Credentials = new NetworkCredential("WRAP access_token", "123456789");
• C. Insert the following code segment at line 06:
  Proxy.Credentials = new NetworkCredential("Authorization", "WRAP
  access_token=\"123456789"\"");
• D. Insert the following code segment at line 06:
  Proxy.SendingRequest += new EventHandler<SendingRequestEventArgs>
  (proxy_SendingRequest);
  Insert the following code segment at line 09:
  void proxy_SendingRequest(object sender, SendingRequestEventArgs e){ e.RequestsHeaders.Add("Authorization","WRAP access_token", "123456789"); }