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Microsoft 70-516 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 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) SaveChanges
B) ApplyChanges
C) Refresh
D) Attach

2. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to create an application. The application contains the following code segment. (Line numbers are included for reference only.)
01 class DataAccessLayer
02 {
03 private static string connString;
04 ...
05 ...
06 public static DataTable GetDataTable(string command){
07 ...
08 ...
09 }
10 }
You need to define the connection life cycle of the DataAccessLayer class.
You also need to ensure that the application uses the minimum number of connections to the database.
What should you do?

A) Insert the following code segment at line 07:
using (SqlConnection conn = new SqlConnection(connString))
{
conn.Open();
}
B) Insert the following code segment at line 04.
private SqlConnection conn = new SqlConnection(connString);
public void Open()
{
conn.Open();
}
public void Close()
{
conn.Close();
}
C) Replace line 01 with the following code segment.
class DataAccessLayer : IDisposable
Insert the following code segment to line 04.
private SqlConnection conn = new SqlConnection(connString);
public void Open()
{
conn.Open();
}
public void Dispose()
{
conn.Close();
}
D) Insert the following code segment at line 04.
private static SqlConnection conn = new SqlConnection(connString);
public static void Open()
{
conn.Open();
}
public static void Close()
{
conn.Close();
}

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

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 database. You load records from the Customers table
into a DataSet object named dataset.
You need to retrieve the value of the City field from the first and last records in the Customers table.
Which code segment should you use?

A) DataRelation relationFirst = dataset.Relations[0]; DataRelation relationLast = dataset.Relations[dataset.Relations.Count]; string first = relationFirst.childTable.Columns["City"].ToString(); string last = relationLast.childTable.Columns["City"].ToString();
B) DataTable dt = dataset.Tables["Customers"]; string first = dt.Rows[0]["City"].ToString(); string last = dt.Rows[dt.Rows.Count]["City"].ToString();
C) DataRelation relationFirst = dataset.Relations[0]; DataRelation relationLast = dataset.Relations[dataset.Relations.Count - 1]; string first = relationFirst.childTable.Columns["City"].ToString(); string last = relationLast.childTable.Columns["City"].ToString();
D) DataTable dt = dataset.Tables["Customers"]; string first = dt.Rows[0]["City"].ToString(); string last = dt.Rows[dt.Rows.Count - 1]["City"].ToString();

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.
The application has two DataTable objects that reference the Customers and Orders tables in the
database.
The application contains the following code segment. (Line numbers are included for reference only.)
01 DataSet customerOrders = new DataSet();
02 customerOrders.EnforceConstraints = true;
03 ForeignKeyConstraint ordersFK = new ForeignKeyConstraint("ordersFK",
04 customerOrders.Tables
["Customers"].Columns["CustomerID"],
05 customerOrders.Tables["Orders"].Columns
["CustomerID"]);
06 ...
07 customerOrders.Tables["Orders"].Constraints.Add(ordersFK);
You need to ensure that an exception is thrown when you attempt to delete Customer records that have
related Order records.
Which code segment should you insert at line 06?

A) ordersFK.DeleteRule = Rule.SetNull;
B) ordersFK.DeleteRule = Rule.None;
C) ordersFK.DeleteRule = Rule.Cascade;
D) ordersFK.DeleteRule = Rule.SetDefault;

Solutions: