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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 Microsoft .NET Framework 4 to develop an application that uses
the Entity Framework.
The application has the entity model shown in the following diagram.

The application must create a projection of the unique set of names and year-to-date sales for territories
where at least one sales person had sales last year of more than $100,000.
The projection must consist of properties named Sales and Name. You need to write a query that will
generate the required projection.
Which code segment should you use?

A) (from person in model.SalesPersons where (person.SalesLastYear > 100000) select new {
Name = person.SalesTerritory.Name,
Sales = person.SalesTerritory.SalesYTD
}
).Distinct();
B) model.SalesTerritories.Where( t => t.SalesPersons.Any( p => p.SalesLastYear > 100000)) .Select( t=> new { t.Name, t.SalesYTD})
.Distinct();
C) model.SalesTerritories.Where( t=> t.SalesPersons.Any( p => p.SalesLastYear > 100000)) .Select( t=> new { t.Name, Sales = t.SalesYTD});
D) (from person in model.SalesPersons where (person.SalesLastYear > 100000) select new {
Name = person.SalesTerritory.Name,
Sales = person.SalesTerritory.SalesYTD
}
);

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

3. You develop a Microsoft .NET application that uses Entity Framework to store entities in a Microsft SQL
Server 2008 database.
While the application is disconnected from the database, entities that are modified, are serialized to a local
file.
The next time the application connects to the database, it retrieves the identity from the database by using
an object context
named context and stores the entity in a variable named remoteCustomer.
The application then serializes the Customer entity from the local file and stores the entity in a variable
named localCustomer.
The remoteCustomer and the localCustomer variables have the same entity key.
You need to ensure that the offline changes to the Customer entity is persisted in the database when the
ObjectContext.SaveChanges() method is called.
Which line of code should you use?

A) context.ApplyCurrentValues("Customers", remoteCustomer);
B) context.ApplyOriginalValues("Customers", localCustomer);
C) context.ApplyOriginalValues("Customers", remoteCustomer);
D) context.ApplyCurrentValues("Customers", localCustomer);

4. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to develop an application that
uses the Entity Framework.
The application defines the following Entity Data Model.

Within the .edmx file, the following function is defined:
<Function Name="Round" ReturnType="Decimal"> <Parameter Name="val" Type="Decimal" /> <DefiningExpression>
CAST(val as Edm.Int32) </DefiningExpression> </Function>
The application includes the following LINQ query.
var query = from detail in context.SalesOrderDetails select detail.LineTotal.Round();
You need to ensure that the Round function executes on the database server when the query is executed. Which code segment should you use?

A) public static class DecimalHelper
{
public static SqlDecimal Round(this Decimal input)
{
return SqlDecimal.Round(input, 0);
}
}
B) public static class DecimalHelper
{
[EdmFunction("SqlServer", "Round")]
public static Decimal Round(this Decimal Amt)
{
throw new NotSupportedException();
}
}
C) public static class DecimalHelper
{
[EdmFunction("Edm", "Round")]
public static Decimal Round(this Decimal Amt)
{
throw new NotSupportedException();
}
}
D) public static class DecimalHelper
{
public static Decimal Round(this Decimal input)
{
return (Decimal)(Int32)input;
}
}

5. 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 use the ADO.NET Entity Framework to manage persistence-ignorant entities. You create an
ObjectContext instance named context.
Then, you directly modify properties on several entities. You need to save the modified entity values to the
database.
Which code segment should you use?

A) context.SaveChanges(SaveOptions.DetectChangesBeforeSave);
B) context.SaveChanges();
C) context.SaveChanges(SaveOptions.AcceptAllChangesAfterSave);
D) context.SaveChanges(SaveOptions.None);

Solutions: