Microsoft 70-516 : TS: Accessing Data with Microsoft .NET Framework 4

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

1. You have a ContosoEntities context object named context and a Color object stored in a variable named color.
You write the following code:
context.Colors.DeleteObject(color); context.SaveChanges();
When the code runs, it generates the following exception:
System.Data.UpdateException: An error occurred while updating the entries. See
the inner exception for detials. --->
System.Data.SqlClient.SqlException: The DELETE satement conflicted with the
REFERENCE constraint "FK_PartColor".
The conflict occurred in database "Contoso", table "dbo.Parts", column
'ColorId'
You need to resolve the exception without negatively impacting the rest of the application. What should you do?

A) In the database, remove the foreign key association between the Parts table and the Colors table, and then update the entity data model.
B) Add code before the call to the DeleteObject() method to examine the collection of Part objects associated with the Color object and then assign null to the Color property for each Part object.
C) Add a transation around the call to the SaveChanges() method and handle the exception by performing a retry.
D) Change the End1 OnDelete proprety of the FK_PartColor association from None to Cascade
E) Change the End2 OnDelete proprety of the FK_PartColor association from None to Cascade

2. 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 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.
B) 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.
C) 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.
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.

3. You use Microsoft Visual Studio 2010 and .NET Framework 4.0 to develop an application.
You use entity Framework Designer to create an Entity Data Model from an existing database by using the
Generate From Database wizard.
The model contains an entity type named Product. The Product type requires an additional property that is
not mapped to database colomn.
You need to add the property to product. What should you do?

A) Add the property in a partial class named Product in a new source file.
B) Create a comlex type with the name of the property in the Entity Framework Designer.
C) Create a function import with the name of property in the Entity Framework Designer.
D) Add the property in the generated class file, and select Run Custom Tool from the solution menu.

4. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to develop an application that
connects to a Microsoft SQL Server 2008 database.
You use the ADO.NET Entity Framework Designer to model entities. You add the following stored
procedure to the database, and you add a function import to the model.
CREATE PROCEDURE [dbo].[InsertDepartment] @Name nvarchar(50), @ID int NULL OUTPUT
AS INSERT INTO Department (Name) VALUES (@Name) SELECT @ID = SCOPE_IDENTITY()
You need to insert a new department and display the generated ID. Which code segment should you use?

A) using (SchoolEntities context = new SchoolEntities())
{
var id = new ObjectParameter("ID", null));
context.InsertDepartment("Department 1", id);
Console.WriteLine(id.Value);
}
B) using (SchoolEntities context = new SchoolEntities())
{
var id = context.InsertDepartment("Department 1", null);
Console.WriteLine(id);
}
C) using (SchoolEntities context = new SchoolEntities())
{
ObjectParameter id = null;
context.InsertDepartment("Department 1", id);
Console.WriteLine(id.Value);
}
D) using (SchoolEntities context = new SchoolEntities())
{
var id = new ObjectParameter("ID", typeof(int));
context.InsertDepartment("Department 1", id);
Console.WriteLine(id.Value);
}

5. You use Microsoft Visual Studio 2010 to create a Microsoft .NET Framework 4.0 application. You create an Entity Data Model for the database tables shown in the following diagram.

You need to modify the .edmx file so that a many-to-many association can exist between the Address and
Customer entities.
Which storage Model section of the .edmx file should you include?

A) <EntityType Name="CustomerAddress">
<Key>
<PropertyRef Name="CustomerID" />
<PropertyRef Name="AddressID" />
</Key>
<Property Name="CustomerID" Type="int" Nullable="false" />
<Property Name="AddressID" Type="int" Nullable="false" />
<Property Name="AddressType" Type="nvarchar" Nullable="false" MaxLength="50"
DefaultValue="Home" />
</EntityType>
B) <EntityType Name="CustomerAddress">
<Key>
<PropertyRef Name="CustomerID" />
<PropertyRef Name="AddressID" />
</Key>
<Property Name="CustomerID" Type="int" Nullable="false"/>
<Property Name="AddressID" Type="int" Nullable="false"/>
<Property Name="AddressType" Type="nvarchar" Nullable="false" MaxLength="50" />
</EntityType>
C) <EntityType Name="CustomerAddress"> <Key>
<PropertyRef Name="CustomerAddressID" /> </Key> <Property Name="CustomerAddressID" Type="int" Nullable="false" StoreGeneratedPattern="Identity" /
>
<Property Name="CustomerID" Type="int" Nullable="false"/>
<Property Name="AddressID" Type="int" Nullable="false" />
<Property Name="AddressType" Type="nvarchar" Nullable="false" MaxLength="50"/>
</EntityType>
D) <EntityType Name="CustomerAddress">
<Key>
<PropertyRef Name="CustomerAddressID" />
<PropertyRef Name="CustomerID" />
<PropertyRef Name="AddressID" />
</Key>
<Property Name="CustomerAddressID" Type="int" Nullable="false" StoreGeneratedPattern="Identity" /
>
<Property Name="CustomerID" Type="int" Nullable="false"/>
<Property Name="AddressID" Type="int" Nullable="false"/>
<Property Name="AddressType" Type="nvarchar" Nullable="false" MaxLength="50"/>
</EntityType>

Solutions: