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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 connects to a Microsoft SQL Server 2008 database. The application includes a SqlConnection named
conn and a SqlCommand named cmd.
You need to create a transaction so that database changes will be reverted in the event that an exception is
thrown.
Which code segment should you use?

A) var transaction = conn.BeginTransaction(); cmd.Transaction = transaction; try {
...
transaction.Commit();
}
catch
{
transaction.Rollback();
}
B) var transaction = conn.BeginTransaction(); cmd.Transaction = transaction; try {
...
transaction.Commit();
}
catch
{
transaction.Dispose();
}
C) var transaction = conn.BeginTransaction(); cmd.Transaction = transaction; try {
...
}
catch
{
transaction.Commit();
}
D) var transaction = conn.BeginTransaction(); cmd.Transaction = transaction; try {
...
transaction.Rollback();
}
catch
{
transaction.Dispose();
}

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 2008 database.
The database includes a database table named ProductCatalog as shown in the exhibit:

You add the following code segment to query the first row of the ProductCatalog table. (Line numbers are included for reference only.)
01 using(SqlConnection cnx = new SqlConnection(connString)
02 {
03 var command = cnx.CreateCommand();
04 command.CommandType = CommandType.Text;
05 command.CommandText = "SELECT TOP 1 * FROM dbo.ProductCatalog";
06 cnx.Open();
07 var reader = command.ExecuteReader();
08 if (reader.Read())
09 {
10 var id = reader.GetInt32(0);
11 ...
12 reader.Close();
13 }
14 }
Which answer belongs in line 11?

A) var weight = reader.GetFloat(1); var price = reader.Doublel(2); var status = reader.GetByte(3);
B) var weight = reader.GetDouble(1); var price = reader.GetFloat(2); var status = reader.GetBoolean(3);
C) var weight = reader.GetDouble(1); var price = reader.GetDecimal(2); var status = reader.GetBoolean(3);
D) var weight
= reader.GetFloat(1); var price = reader.GetDecimal(2); var status = reader.GetByte(3);

3. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to create an application.
You use Microsoft ADO.NET Entity Data Model (EDM) to model entities.
You create an entity named Person with a schema defined by the following XML fragment.
<EntityType Name="CPerson"> <Key> <PropertyRef Name="PersonId" /> </Key>
<Property Name="PersonId" Type="Int32" Nullable="false" />
<Property Name="CompanyName" Type="String" />
<Property Name="ContactName" Type="String" />
<Property Name="ContactTitle" Type="String" />
<Property Name="Address" Type="String" />
</EntityType>
You need to ensure that entities within the application are able to add properties related to the city, region,
and country of Person's address.
What should you do?

A) Create a SubEntity named Address. Map the SubEntity to a stored procedure that retrieves city, region, and country.
B) Create a new complex type named CAddress that contains the properties for city, region, and country. Change the Type of the Address property in CPerson to "Self.CAddress".
C) Create a view named Name that returns city, region, and country along with person IDs. Add a WHERE clause to filter the results to display only the City, Region and Country properties for a specific Person entity.
D) Create a new entity named Address. Add a person ID property to filter the results to display only the City, Region, and Country properties for a specific Person entity.

4. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to create an application.
The application connects to a Microsoft SQL Server 2008 database.
You use the ADO.NET Entity Framework to model your entities. You use ADO.NET self-tracking entities.
You need to ensure that the change-tracking information for the self-tracking entities can be used to update
the database.
Which ObjectContext method should you call after changes are made to the entities?

A) Refresh
B) SaveChanges
C) ApplyChanges
D) Attach

5. You are developing an ADO.NET 4.0 application that interacts with a Microsoft SQL Server 2008 server
through the SQL Server Native Client.
You create a trace DLL registry entry and you register all of the trace schemas.
You need to trace the application data access layer. Which control GUID file should you use?

A) ctrl.guid.adonet
B) ctrl.guid.mdac
C) ctrl.guid.msdadiag
D) ctrl.guid.snac10

Solutions: