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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 develop an application.
You use the ADO.NET Entity Framework Designer to model entities. The model contains an entity type
named Product.
You need to ensure that a stored procedure will be invoked when the ObjectContext.SaveChanges method
is executed after an attached Product has changed.
What should you do in the ADO.NET Entity Framework Designer?

A) Add a function import for the Product entity type.
B) Add a complex type named Product that is mapped to the stored procedure.
C) Add a new entity that has a base class of Product that is mapped to the stored procedure.
D) Add a stored procedure mapping for the Product entity type.

2. Which code segment will properly return the TimeSpan returned by the stopWatch variable?

A) Stopwatch stopWatch = new Stopwatch(); stopWatch.Start(); DoSomething(); stopWatch.Reset(); TimeSpan ts = stopWatch.Elapsed; string elapsedTime = String.Format("{0:00}:{1:00}:{2:00}.{3:00}", ts.Hours, ts.Minutes, ts.Seconds, ts.Milliseconds / 10); Console.WriteLine(elapsedTime, "RunTime");
private void DoSomething()
{ ... }
B) Stopwatch stopWatch = new Stopwatch();
stopWatch.Start();
DoSomething();
stopWatch.Stop();
TimeSpan ts = stopWatch.Elapsed;
string elapsedTime = String.Format("{0:00}:{1:00}:{2:00}.{3:00}", ts.Hours, ts.Minutes, ts.Seconds,
ts.Milliseconds / 10);
Console.WriteLine(elapsedTime, "RunTime");
private void DoSomething()
{ ... }
C) Stopwatch stopWatch = new Stopwatch(); stopWatch.Start(); DoSomething(); TimeSpan ts = stopWatch.Elapsed; string elapsedTime = String.Format("{0:00}:{1:00}:{2:00}.{3:00}", ts.Hours, ts.Minutes, ts.Seconds, ts.Milliseconds / 10); Console.WriteLine(elapsedTime, "RunTime");
private void DoSomething()
{ ... }
D) Stopwatch stopWatch = new Stopwatch(); stopWatch.Begin(); DoSomething(); stopWatch.End(); TimeSpan ts = stopWatch.Elapsed; string elapsedTime = String.Format("{0:00}:{1:00}:{2:00}.{3:00}", ts.Hours, ts.Minutes, ts.Seconds, ts.Milliseconds / 10); Console.WriteLine(elapsedTime, "RunTime");
private void DoSomething()
{ ... }

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

4. 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.Credentials = new NetworkCredential("Authorization", "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.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"); }
D) 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");
}

5. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to develop an application.
You use the ADO.NET Entity Framework Designer to model entities. You retrieve an entity from an object
context.
A different application updates the database. You need to update the entity instance to reflect updated
values in the database.
Which line of code should you use?

A) context.AcceptAllChanges() ;
B) context.LoadProperty(entity, "Server", MergeOption.OverwriteChanges);
C) context.Refresh(RefreshMode.StoreWins, entity);
D) context.LoadProperty(entity, "Client", MergeOption.OverwriteChanges);

Solutions: