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Microsoft TS: Accessing Data with Microsoft .NET Framework 4 Sample Questions:

1. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to create an application.
The application connects to a Microsoft SQL Server database. The application uses the ADO.NET Entity
Framework to model entities.
The database includes objects based on the exhibit.
The application includes the following code segment. (Line numbers are included for reference only.)
01 using (AdventureWorksEntities context = new AdventureWorksEntities()){
02 ...
03 foreach (SalesOrderHeader order in customer.SalesOrderHeader){
04 Console.WriteLine(String.Format("Order: {0} ",
order.SalesOrderNumber));
05 foreach (SalesOrderDetail item in order.SalesOrderDetail){
06 Console.WriteLine(String.Format("Quantity: {0} ", item.Quantity));
07 Console.WriteLine(String.Format("Product: {0} ",
item.Product.Name));
08 }
09 }
10 }
You want to list all the orders for a specified customer. You need to ensure that the list contains the following fields:
-Order number
-Quantity of products
-Product name
Which code segment should you insert at line 02?

A) context.ContextOptions.LazyLoadingEnabled = true;
Contact customer = (from contact in context.Contact
include("SalesOrderHeader.SalesOrderDetail")
select conatct).FirstOrDefault();
B) Contact customer = (from contact in context.Contact
include("SalesOrderHeader") select conatct).FirstOrDefault();
C) Contact customer = context.Contact.Where("it.ContactID = @customerId", new ObjectParameter ("customerId", customerId)).First();
D) Contact customer = context.Contact.Where("it.ContactID = @customerId", new ObjectParameter ("@customerId", customerId)).First();

2. 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 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"); }
B) 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");
}
C) Insert the following code segmen at line 06:
Proxy.Credentials = new NetworkCredential("WRAP access_token", "123456789");
D) Insert the following code segment at line 06:
Proxy.Credentials = new NetworkCredential("Authorization", "WRAP
access_token=\"123456789"\"");

3. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 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) Configure IIS to allow the POST and DELETE verbs for the .svc Application Extension.
B) Add the following line of code to the InitializeService method of the service: config.SetEntitySetAccessRule ("*", EntitySetRights.WriteDelete | EntitySetRights.WriteMerge);
C) Configure IIS to allow the PUT and DELETE verbs for the .svc Application Extension.
D) Add the following line of code to the InitializeService method of the service: config.SetEntitySetAccessRule ("*", EntitySetRights.WriteDelete | EntitySetRights.WriteInsert);

4. You use Microsoft Visual Studio 2010 and Microsoft. NET Framework 4.0 to create an application.
The application connects to a Microsoft SQL Server database. You use Entity SQL of the ADO.NET Entity
Framework to retrieve data from the database.
You need to define a custom function in the conceptual model. You also need to ensure that the function
calculates a value based on properties of the object.
Which two XML element types should you use? (Each correct answer presents part of the solution. Choose
two.)

A) Function
B) FunctionImport
C) DefiningExpression
D) Association
E) Dependent

5. You use Microsoft .NET Framework 4.0 to develop an application.
You write the following code to update data in a Microsoft SQL Server 2008 database.
(Line numbers are included for reference only.)
01 private void ExecuteUpdate(SqlCommand cmd, string connString, string
updateStmt)
02 {
03 ...
04 }
You need to ensure that the update statement executes and that the application avoids connection leaks. Which code segment should you insert at line 03?

A) SqlConnection conn = new SqlConnection(connString); conn.Open(); cmd.Connection = conn; cmd.CommandText = updateStmt; cmd.ExecuteNonQuery();
B) using (SqlConnection conn = new SqlConnection(connString))
{
conn.Open() ;
cmd.Connection = conn;
cmd.CommandText = updateStmt;
cmd.ExecuteNonQuery() ;
}
C) using (SqlConnection conn = new SqlConnection(connString))
{
cmd.Connection = conn;
cmd.CommandText = updateStmt;
cmd.ExecuteNonQuery();
cmd.Connection.Close();
}
D) SqlConnection conn = new SqlConnection(connString); conn.Open(); cmd.Connection = conn; cmd.CommandText = updateStmt; cmd.ExecuteNonQuery(); cmd.Connection.Close() ;

Solutions: