Microsoft TS: Accessing Data with Microsoft .NET Framework 4 : 070-516

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Microsoft 070-516 Exam Syllabus Topics:

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

1. You use Microsoft Visual Studio 2010 and .NET Framework 4.0 to enhance and existing application use
Entity Framework.
The classes that represent the entites in the model are Plain old CLR Object (POCO) Classes.
You need to connect the existing POCO classes to an entity framework context. What should you do?

A) 1. Generate a MetadataWorkspace and create an ObjectContext for the model.
2.Create an ObjectSet fort he POCO classes.
3.Disable Proxy object creation on the ContextOptions of the ObjectContext.
B) 1. Generate an Entity Data Model fort he POCO classes.
2.Create an ObjectSet fort he POCO classes.
3.Disable Proxy object creation on the ContextOptions of the ObjectContext.
4.Enable lazy loading on the ContextOptions of the ObjectContext.
C) 1. Generate an Entity Data Model for the POCO classes.
2.Create an ObjectSet for the POCO classes.
3.Set Code Generation Strategy on the Entity Data Model to none.
4.Create an ObjectContext for the model.
D) 1. Generate a MetadataWorkspace and create an ObjectContext for the model.
2.Disable Proxy object creation on the ContextOptions of the ObjectContext.
3.Enable lazy loading on the ContextOptions of the ObjectContext.

2. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to develop an application that
uses LINQ to SQL.
The application contains the following model.

Each region contains a single vendor. Customers order parts from the vendor that is located in their region.
You need to ensure that each row in the Customer table references the appropriate row from the Vendor
table.
Which code segment should you use?

A) SalesDataContext dc = new SalesDataContext("...");
var query = from c in dc.Customers
join v in dc.Vendors on c.VendorlD equals v.VendorID
select new { Customer = c, Vendor = v };
foreach (var u in query){
u.Vendor.Region = u.Customer.Region;
}
dc.SubmitChanges();
B) SalesDataContext dc = new SalesDataContext("...");
var query = from c in dc.Customers
join v in dc.Vendors on c.Region equals v.Region
select new { Customer = c. Vendor = v };
foreach (var u in query){
u.Vendor.VendorlD = u.Customer.VendorID;
}
dc.SubmitChanges();
C) SalesDataContext dc = new SalesDataContext("...");
var query = from v in dc.Vendors
join c in dc.Customers on v.Region equals c.Region
select new { Vendor = v, Customer = c };
foreach (var u in query){
u.Customer.VendorlD = u.Vendor.VendorlD;
}
dc.SubmitChanges();
D) SalesDataContext dc = new SalesDataContext("...");
var query = from v in dc.Vendors
join c in dc.Customers on v.VendorlD equals c.VendorID
select new { Vendor = v, Customer = c };
foreach (var u in query){
u.Customer.Region = u.Vendor.Region;
}
dc.SubmitChanges();

3. 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.
The application includes a Customer entity along with a CustomerKey property of the Guid type as shown in
the following exhibit:

You discover that when the application adds a new instance of a Customer, calling the SaveChanges
method
results in the following error message: "Server generated keys are only supported for identity columns."
You need to ensure that the application can add new Customer entities. What should you do?

A) Add a handler for the ObjectContext.ObjectMaterialized event. In the event handler, set the CustomerKey value.
B) Call the ObjectContext.CreateEntityKey method before saving a Customer entity.
C) Call the ObjectContext.Attach method before saving a Customer entity.
D) Add a handler for the ObjectContext.SavingChanges event. In the event handler, set the CustomerKey value.

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

5. You use Microsoft Visual Studio 2010 and .NET Framework 4.0 to develop an application that uses the
Entity Framewok.
You need to execute custom logic when an entity is attached to the ObjectContext. What should you do?

A) Create a partial method named OnAttached in the partial class for the entity.
B) Create a partial method named OnStateChanged in the partial class for the entity.
C) Create an event handler to handle the ObjectMaterialized event.
D) Create an event handler to handle the ObjectStateManagerChanged event.

Solutions: