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(l)
Authorization: WRAP access_token “123456789”
You add the following method to your DataService implementation.

Protected Overrides Sub OnStartProcessingRequest( ByVal args As
System.Data.Services.ProcessRequestArgs)
…
End Sub
You need to ensure that the method retrieves the authentication token. Which line of code should
you use?

A.
Dim token As String =
args.OperationContext.RequestHeaders(“Authorization”)

B.
Dim token As String =
args.OperationContext.RequestHeaders(“URAP access token”)

C.
Dim token As String =
args.OperationContext.ResponseHeaders(“WRAP access token”)

D.
Dim token As String =
args.OperationContext.ResponseHeaders(“Authorization”)

Explanation:
OData and Authentication – OAuth WRAP
(http://blogs.msdn.com/b/astoriateam/archive/2010/08/19/odata-and-authentication-part-8-
oauth-wrap.aspx)