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Microsoft TS: Accessing Data with Microsoft .NET Framework 4 Sample Questions:

1. You use Microsoft .NET Framework 4.0 to develop an application that connects to a Microsoft SQL Server
200B database.
You populate a SqlDataAdapter by using the following code. (Line numbers are included for reference only.)
01 SqlDataAdapter dataAdapter1 = new SqlDataAdapter("SELECT * FROM
[BlogEntries] ORDER BY CreationDate", connection);
02 cmdBuilder = new SqlCommandBuilder(dataAdapter1);
03 dataAdapter1.Fill(BlogEntryDataSet, "BlogEntries");
04 ....
05 connection.Close();
You need to update the blog owner for all BlogEntry records. Which code segment should you insert at line 04?

A) SqlDataAdapter dataAdapter2 = new SqlDataAdapter("UPDATE [BlogEntries] SET [BlogOwner] = "New
'Owner' 3", connection);
dataAdapter2.Update(BlogEntryDataSet, "BlogEntries");
B) foreach(DataRow row in BlogEntryDataSet.Tables["BlogEntries"].Rows) {
row.Item["BlogOwner""] = "New Owner";
}
dataAdapter1.Update(BlogEntryDataSet, "BlogEntries");
C) foreach(DataRow row in BlogEntryDataSet.Tables["BlogEntries"].Rows) {
row.Item["BlogOwner""] = "New Owner";
}
dataAdapter1.Fill(BlogEntryDataSet, "BlogEntries");
D) SqlDataAdapter dataAdapter2 = new SqlDataAdapter(dataAdapterl.UpdateCommand); dataAdapter2.Fill(BlogEntryDataSet, "BlogEntries");

2. You use Microsoft .NET framework 4.0 to develop an application that connects to a Microsoft SQL Server
2008 database named AdventureWorksLT.
The database resides on an instance named INSTA on a server named SQL01.
You need to configure the application to connect to the database. Which connection string should you add
to the .config file?

A) Data Source=SQL01\INSTA; Initial Catalog=AdventureWorksLT; Integrated Security=true;
B) Data Source=AdventureWorksLT; Initial Catalog=SQL01\INSTA; Integrated Security=true;
C) Data Source=SQL01; Initial Catalog=AdventureWorksLT; Integrated Security=true; Application Name=INSTA;
D) Data Source=SQL01; Initial Catalog=INSTA; Integrated Security=true; Application Name=AdventureWorksLT;

3. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to create an application.
You use the ADO.NET Entity Framework to model entities. The application connects to a Microsoft SQL
Server database named AdventureWorks.
The application includes the following code segment. (Line numbers are included for reference only.)
01 using (AdventureWorksEntities context = new AdventureWorksEntities())
02 {
03 ObjectQuery <SalesOrderHeader> orders = context.SalesOrderHeader.
Where("it.CreditCardApprovalCode IS NULL").Top("100"); 04 foreach (SalesOrderHeader order in orders){ 05 order.Status = 4; 06 } 07 try{ 08 context.SaveChanges(); 09 } 10 catch (OptimisticConcurrencyException){ 11 ... 12 } 13 }
You need to resolve any concurrency conflict that can occur. You also need to ensure that local changes
are persisted to the database.
Which code segment should you insert at line 11?

A) context.Refresh(RefreshMode.ClientWins, orders); context.AcceptAllChanges();
B) context.Refresh(RefreshMode.StoreWins, orders); context.SaveChanges();
C) context.Refresh(RefreshMode.StoreWins, orders); context.AcceptAllChanges();
D) context.Refresh(RefreshMode.ClientWins, orders); context.SaveChanges();

4. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to create an application.
You are creating the data layer of the application. You write the following code segment.
(Line numbers are included for reference only.)
01 public static SqlDataReader GetDataReader(string sql)
02 {
03 SqlDataReader dr = null;
04 ...
05 return dr;
06 }
You need to ensure that the following requirements are met: The SqlDataReader returned by the GetDataReader method can be used to retreive rows from the database.
--
SQL connections opened within the GetDataReader method will close when the SqlDataReader is closed.
Which code segment should you insert at the line 04?

A) SqlConnection cnn = new SqlConnection(strCnn); SqlCommand cmd = new SqlCommand(sql, cnn); cnn.Open(); { try { dr = cmd.ExecuteReader(); } finally {
cnn.Close();
}
}
B) SqlConnection cnn = new SqlConnection(strCnn); SqlCommand cmd = new SqlCommand(sql, cnn);
cnn.Open();
{
try
{
dr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
}
catch
{
cnn.Close();
throw;
}
}
C) SqlConnection cnn = new SqlConnection(strCnn); SqlCommand cmd = new SqlCommand(sql, cnn); cnn.Open(); { try { dr = cmd.ExecuteReader(); cnn.Close(); } catch {
throw;
}
}
D) using(SqlConnection cnn = new SqlConnection(strCnn)) { try { SqlCommand cmd = new SqlCommand(sql, cnn); cnn.Open(); dr = cmd.ExecuteReader(); } catch {
throw;
}
}

5. 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 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.
C) 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".
D) 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.

Solutions: