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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 uses the ADO.NET Entity Framework to model entities.
You need to create a database from your model. What should you do?

A) Run the edmgen.exe tool in FromSSDLGeneration mode.
B) Run the edmgen.exe tool in FullGeneration mode.
C) Use the Generate Database Wizard in Visual Studio. Run the resulting script against a Microsoft SQL Server database.
D) Use the Update Model Wizard in Visual Studio.

2. 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");

3. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 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 column's 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 update function without requiring changes in
the code.
What should you do?

A) Modify the SELECT SQL statement provided to the DataContext object to use an INNER JOIN between the Customer and Orders tables.
B) Override the Update operation of the DataContext object.
C) Add new entities to the DataContext object for the Customers and Orders tables.
D) Override the Delete operation of the DataContext object.

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

5. You use Microsoft .NET Framework 4.0 to develop an application that connects to a local Microsoft SQL
Server 2008 database.
The application can access a high-resolution timer. You need to display the elapsed time, in sub-
milliseconds (<1 millisecond),
that a database query takes to execute. Which code segment should you use?

A) Stopwatch sw = new Stopwatch(); sw.Start() ; command.ExecuteNonQuery(); sw.Stop(); Console.WriteLine("Time Elapsed: {0:N} ms", sw.Elapsed.Milliseconds);
B) int Start = Environment.TickCount; command.ExecuteNonQuery(); int Elapsed = (Environment.TickCount) - Start; Console.WriteLine("Time Elapsed: {0:N} ms", Elapsed);
C) Stopwatch sw = Stopwatch.StartNew(); command.ExecuteNonQuery() ; sw.Stop() ; Console.WriteLine("Time Elapsed: {0:N} ms", sw.Elapsed.TotalMilliseconds);
D) DateTime Start = DateTime.UtcNow; command.ExecuteNonQuery(); TimeSpan Elapsed = DateTime.UtcNow - Start; Console.WriteLine("Time Elapsed: {0:N} ms", Elapsed.Milliseconds);

Solutions: