Microsoft MCTS 70-516

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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 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.VendorlD equals c.VendorID
select new { Vendor = v, Customer = c };
foreach (var u in query){
u.Customer.Region = u.Vendor.Region;
}
dc.SubmitChanges();
D) 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();

2. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to create an application. The application connects to a Microsoft SQL Server database. You create the classes shown in the following exhibit:

You add the following code segment to the application. (Line numbers are included for reference only.)
01 public void QueryPlayers (List <League> leagues) {
02 ...
03 }
You create a LINQ query to retrieve a collection of Player objects.
You need to ensure that the collection includes all the players from each team and every league. Which
code segment should you insert at line 02?

A) var query = leagues.SelectMany(l => l.Teams.SelectMany(t => t.Players));
B) var query = leagues.SelectMany(l => l.Teams.Select(t => t.Players));
C) var query = leagues.Select(l => l.Teams.Select(t => t.Players));
D) var query = leagues.Select(l => l.Teams.SelectMany(t => t.Players));

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 manage Plain Old CLR Objects (POCO) entities.
You create a new POCO class. You need to ensure that the class meets the following requirements:
-It can be used by an ObjectContext.
-It is enabled for change-tracking proxies.
Which two actions should you perform? (Each correct answer presents part of the solution. Choose two.)

A) Configure the navigation property to return a type that implements the ICollection interface.
B) Modify each mapped property to contain non-sealed, public, and virtual accessors.
C) Configure the navigation property to return a type that implements the IEntityWithRelationships interface.
D) Configure the navigation property to return a type that implements the IQueryable interface.
E) Modify each mapped property to contain sealed and protected accessors.

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

5. 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 manage customer and related order records.
You add a new order for an existing customer. You need to associate the Order entity with the Customer
entity.
What should you do?

A) Use the Attach method of the ObjectContext to add both Order and Customer entities.
B) Set the Value property of the EntityReference of the Order entity.
C) Use the AddObject method of the ObjectContext to add both Order and Customer entities.
D) Call the Add method on the EntityCollection of the Order entity.

Solutions: