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QUESTION: 19
You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4 to create an
application. The application connects to a Microsoft SQL Server database. The application has
two DataTable objects that reference the Customers and Orders tables in the database. The
application contains the following code segment. (Line numbers are included for reference
only.)
01 DataSet customerOrders = new DataSet();
02 customerOrders.EnforceConstraints = true;
03 ForeignKeyConstraint ordersFK = new ForeignKeyConstraint(“ordersFK”,
04 customerOrders.Tables[“Customers”].Columns[“CustomerID”],
05 customerOrders.Tables[“Orders”].Columns[“CustomerID”]);

07 customerOrders.Tables[“Orders”].Constraints.Add(ordersFK);
You need to ensure that an exception is thrown when you attempt to delete Customer records
that have related Order records. Which code segment should you insert at line 06?
A. ordersFK.DeleteRule = Rule.SetDefault;
B. ordersFK.DeleteRule = Rule.None;
C. ordersFK.DeleteRule = Rule.SetNull;
D. ordersFK.DeleteRule = Rule.Cascade;

Answer: B
QUESTION: 20 You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4 to create an application. The application connects to a Microsoft SQL Server 2008 database. The application uses DataContexts to query the database. You create a function that meets the following requirements: Updates the Customer table on the database when a customer is marked as deleted. Updates the related entries in other tables (CustomerAddress, CustomerContacts) by marking them as deleted. Prevents consumer code from setting the Deleted columns value directly. You need to ensure that the function verifies that customers have no outstanding orders before they are marked as deleted. You also need to ensure that existing applications can use the updated function without requiring changes in the code. What should you do?
A. Override the Delete operation of the DataContext object.
B. Override the Update operation of the DataContext object.
C. Modify the SELECT SQL statement provided to the DataContext object to use an INNER JOIN between the Customer and Orders tables.
D. Add new entities to the DataContext object for the Customers and Orders tables.

Answer: A
QUESTION: 21 You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4 to create an application. The application uses the ADO.NET Entity Framework to model entities. The application includes a Customer entity along with a CustomerKey property of the Guid type as shown in the following exhibit.
You discover that when the application adds a new instance of a Customer, calling the
SaveChanges method results in the following error message:
“Server generated keys are only supported for identity columns.”
You need to ensure that the application can add new Customer entities. What should you do?

A. Add a handler for the ObjectContext.SavingChanges event. In the event handler, set the CustomerKey value.
B. Add a handler for the ObjectContext.ObjectMaterialized event. In the event handler, set the CustomerKey value.
C. Call the ObjectContext.Attach method before saving a Customer entity.
D. Call the ObjectContext.CreateEntityKey method before saving a Customer entity.

Answer: A
QUESTION: 22 You use Microsoft .NET Framework 4 to develop an application that uses WCF Data Services to retrieve entities. 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();
07 … 08 }

10 }
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 segment at line 06.
proxy.Credentials = new NetworkCredential
(“WRAP access_token”, “123456789”);

B. Insert the following code segment at line 06.
proxy.Credentials = new NetworkCredential
(“Authorization”, “WRAP access_token=\”123456789\””);

C. 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) {

D. RequestHeaders.Add(“WRAP access_token”, 123456789″);
}

E. 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)
{

F. RequestHeaders.Add(“Authorization”,
“WRAP access_token=\”123456789\””);
}
Answer: D
QUESTION: 23 You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4 to create an application. The application uses the ADO.NET Entity Framework to model entities. You deploy an application to a production server. The application uses the model and mapping files that are deployed as application resources. You need to update the conceptual model for the application on the production server. What should you do?
A. Copy the updated .edmx file to the production server.
B. Copy the updated .csdl file to the production server.

C. Copy the updated .ssdl file to the production server.
D. Recompile the application and redeploy the modified assembly file.

Answer: D
QUESTION: 24
You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4 to create an
application. You use the ADO.NET Entity Framework to model entities. The application
connects to a Microsoft SQL Server database named AdventureWorks.The application includes
the following code segment. (Line numbers are included for reference only.)
01 using (AdventureWorksEntities context = new AdventureWorksEntities()){
02 ObjectQuery<SalesOrderHeader> orders =
03 context.SalesOrderHeader.Where(“it.CreditCardApprovalCode IS NULL”).Top(“100”);
04 foreach (SalesOrderHeader order in orders){
05 order.Status = 4;
06 }
07 try {
08 context.SaveChanges();
09 }
10 catch (OptimisticConcurrencyException){
11
12 }
13 }
You need to resolve any concurrency conflict that can occur. You also need to ensure that local
changes are persisted to the database. Which code segment should you insert at line 11?

A. context.Refresh(RefreshMode.ClientWins, orders); context.AcceptAllChanges();
B. context.Refresh(RefreshMode.ClientWins, orders); context.SaveChanges();
C. context.Refresh(RefreshMode.StoreWins, orders); context.AcceptAllChanges();
D. context.Refresh(RefreshMode.StoreWins, orders); context.SaveChanges();

Answer: B
QUESTION: 25 You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4 to create an application. The application uses the ADO.NET Entity Framework to model entities. You need to ensure that the model and mapping files are not deployed as application resources. What should you do?

A. Modify the connection string in the applications .config file to refer to the absolute physical path to the .edmx file.
B. Modify the connection string in the applications .config file to refer to the relative path to the edmx file.
C. Set the value of the .edmx files Metadata Artifact Processing property to Copy to Output Directory.
D. Set the value of the .edmx files Build Action property to Copy to Output.

Answer: C
QUESTION: 26
You use Microsoft .NET Framework 4 to develop an application that connects to a Microsoft
SQL Server 2008 database. The application contains the following code segment.
string SQL = string.Format

(“SELECT * FROM Customer WHERE CompanyName LIKE ‘%{0}%'”,
companyName);
var cmd = new SqlCommand(SQL, con);

You need to reduce the vulnerability to SQL injection attacks. Which code segment should you
use?

A. string SQL = “SELECT * FROM Customer WHERE ” +
“CompanyName LIKE @companyName”;
var cmd = new SqlCommand(SQL, con);
cmd.Parameters.AddWithValue(“@companyName”,
string.Format(“%{0}%”, companyName));

B. string SQL = “SELECT * FROM Customer WHERE ” +
“CompanyName LIKE @companyName”;
var cmd = new SqlCommand(SQL, con);
var param = new SqlParameter(“@companyName”,
string.Format(“%{0}%”, companyName));

C. string SQL = string.Format(“SELECT * FROM ” +
“Customer WHERE CompanyName LIKE {0}”,
new SqlParameter(“@companyName”,
string.Format(“%{0}%”, companyName)));
var cmd = new SqlCommand(SQL, con);

D. string SQL = “SELECT * FROM Customer
@companyName”; var cmd = new SqlCommand(SQL, con);
cmd.Parameters.AddWithValue(“@companyName”,

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