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

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

3. You use Microsoft .NET Framework 4.0 to develop an application.
You write the following code to update data in a Microsoft SQL Server 2008 database.
(Line numbers are included for reference only.)
01 private void ExecuteUpdate(SqlCommand cmd, string connString, string
updateStmt)
02 {
03 ...
04 }
You need to ensure that the update statement executes and that the application avoids connection leaks. Which code segment should you insert at line 03?

A) using (SqlConnection conn = new SqlConnection(connString))
{
conn.Open() ;
cmd.Connection = conn;
cmd.CommandText = updateStmt;
cmd.ExecuteNonQuery() ;
}
B) SqlConnection conn = new SqlConnection(connString); conn.Open(); cmd.Connection = conn; cmd.CommandText = updateStmt; cmd.ExecuteNonQuery();
C) using (SqlConnection conn = new SqlConnection(connString))
{
cmd.Connection = conn;
cmd.CommandText = updateStmt;
cmd.ExecuteNonQuery();
cmd.Connection.Close();
}
D) SqlConnection conn = new SqlConnection(connString); conn.Open(); cmd.Connection = conn; cmd.CommandText = updateStmt; cmd.ExecuteNonQuery(); cmd.Connection.Close() ;

4. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to develop an application that uses the ADO.NET Entity Framework to model entities. You create an entity model as shown in the following diagram.

You need to ensure that all Person entities and their associated EmailAddresses are loaded. Which code segment should you use?

A) var people = context.People.Include("Person.EmailAddresses").ToList();
B) var people = context.People.Except(new ObjectQuery<Person>("Person.EmailAddresses", context)).ToList();
C) var people = context.People.Include("EmailAddresses").ToList();
D) var people = context.People.Except(new ObjectQuery<Person>("EmailAddresses", context)).ToList();

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

Solutions: