You use Microsoft .NET Framework 4 to develop an application that uses WCF Data Services to
persist entities from the following Entity Data Model.

You create a new Blog instance named newBlog and a new Post instance named newPost as shown
in the following code segment. (Line numbers are included for reference only.)
01 Blog newBlog = neu Blog();
02 Post neuPost = neu Post ();
03 –
04 Uci serviceUri = new Uri (“… “);
05 BlogsEntities context = new BlogsEntities(serviceUri);
06
You need to ensure that newPost is related to newBlog through the Posts collection property and
that newPost and newBlog are sent to the service. Which code segment should you insert at line 06?

You use Microsoft .NET Framework 4 to develop an application that connects to a Microsoft SQL
Server 2008 database. The application includes a table adapter named taStore, which has the
following DataTable.

There is a row in the database that has a ProductID of 680. You need to change the Name column in
the row to “New Product Name”. Which code segment should you use?

You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4 to create an application. The
application connects to several SQL Server databases. You create a function that modifies customer
records that are stored in multiple databases. All updates for a given record are performed in a
single transaction. You need to ensure that all transactions can be recovered. What should you do?

You use Microsoft .NET Framework 4 to develop an application that exposes a WCF Data Services
endpoint. The endpoint 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”
You add the following method to your DataService implementation.
protected override void OnStartProcessingRequest
(ProcessRequestArgs args)
{
• • •
}
You need to ensure that the method retrieves the authentication token. Which line of code should
you use?

You are developing a WCF data service that will expose an existing Entity Data Model (EDM). You
have the following requirements:
• Users must be able to read all entities that are exposed in the EDM.
• Users must be able to update or replace the SalesOrderHeader entities.
• Users must be prevented from inserting or deleting the SalesOrderHeader entities
You need to ensure that the data service meets the requirements.
Which code segment should you use in the Initialize method?