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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 the Entity Framework.
The application has an entity model that contains a SalesOrderHeader entity. The entity includes an
OrderDate property of type DateTime.
You need to retrieve the 10 oldest SalesOrderHeaders according to the OrderDate property.
Which code segment should you use?

A) var model = new AdventureWorksEntities(); var sales = model.SalesOrderHeaders.OrderBy(soh => soh.OrderDate).Take(10);
B) var model = new AdventureWorksEntities(); var sales = model.SalesOrderHeaders.OrderByDescending(soh => soh.OrderDate).Take(10);
C) var model = new AdventureWorksEntities(); var sales = model.SalesOrderHeaders.Take(10).OrderByDescending(soh => soh.OrderDate);
D) var model = new AdventureWorksEntities(); var sales = model.SalesOrderHeaders.Take(10).OrderBy(soh => soh.OrderDate);

2. 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="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>
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"
DefaultValue="Home" />
</EntityType>
C) <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>
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>

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

4. How do you define a WCF Data Service query to grab the first 10 records. Options are something like:

A) DataServiceQuery<Order> selectedOrders = context.Orders.AddQueryOption("$expand", "10");
B) DataServiceQuery<Order> selectedOrders = context.Orders.AddQueryOption("$filter", "10");
C) DataServiceQuery<Order> selectedOrders = context.Orders.AddQueryOption("$top", "10");
D) DataServiceQuery<Order> selectedOrders = context.Orders.AddQueryOption("$select", "10");

5. 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 application includes self-tracking entities as shown in the following diagram.

There is a Person entity names person1 that has TrackChanges turned on.
You need to delete all e-mail addresses that are associated with person1 by using an ObjectContext.
What are two possible code segments that you can use to achieve this goal?
(Each correct answer presents a complete solution. Choose two).

A) person1.EMailAddresses = new TrackableCollection<EMailAddress>(); context.SaveChanges();
B) while(person1.EMailAddresses.Count>0){
person1.EmailAddresses.RemoveAt(0);
}
context.SaveChanges();
C) person1.EMailAddresses = null; context.SaveChanges();
D) foreach(var email in person1.EMailAddresses){
email.MarkAsDeleted();
}
context.SaveChanges();

Solutions: