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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 database.
The application uses the ADO.NET LINQ to SQL model to retrieve data from the database.
The application will not modify retrieved data. You need to ensure that all the requested data is retrieved.
You want to achieve this goal using the minimum amount of resources. What should you do?

A) Set ObjectTrackingEnabled to false on the DataContext class.
B) Set ObjectTrackingEnabled to true on the DataContext class.
C) Set DeferredLoadingEnabled to true on the DataContext class.
D) Set DeferredLoadingEnabled to false on the DataContext class.

2. You are developing a new feature that displays an auto-complete list to users as the type color names. You
have an
existing ContosoEntities context object named contex.
To support the new feature you must develop code that will accept a string object named text containing a
user's
partial input and will query the Colors database table to retrieve all color names that begin with that input.
You need to create an Entity SQL (ESQL) query to meet the requirement.
The query must not be vulnerable to a SQL injection attack. Which code segment should you use?

A) var parameter = new ObjectParameter("text", text + "%"); var result = context.CreateQuery<string>(
"SELECT VALUE (c.Name) FROM Colors AS c WHERE c.Name LIKE '@text'", parameter);
B) var parameter = new ObjectParameter("text", text + "%");
var result = context.CreateQuery<string>( "SELECT (c.Name) FROM Colors AS c WHERE c.Name LIKE @text", parameter);
C) var parameter = new ObjectParameter("text", text + "%");
var result = context.CreateQuery<string>(
"SELECT VALUE (c.Name) FROM Colors AS c WHERE c.Name LIKE @text",
parameter);
D) var parameter = new ObjectParameter("text", HttpUtility.HtmlEncode(text) + "%"); var result = context.CreateQuery<string>(
"SELECT (c.Name) FROM Colors AS c WHERE c.Name LIKE '@text'@, parameter);

3. 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.Attach 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.CreateEntityKey method before saving a Customer entity.

4. The database contains a table named Categories. The Categories table has a primary key identity column
named CategoryID.
The application inserts new records by using the following stored procedure.
CREATE PROCEDURE dbo.InsertCategory @CategoryName nvarchar(15), @Identity int OUT
AS INSERT INTO Categories (CategoryName) VALUES(@CategoryName) SET @Identity = SCOPE_IDENTITY() RETURN @@ROWCOUNT
You write the following code segment.
SqlDataAdapter adapter = new SqlDataAdapter("SELECT categoryID, CategoryName
FROM dbo.Categories",connection);
adapter.InsertCommand = new SqlCommand("dbo.InsertCategory", connection);
adapter.InsertCommand.CommandType = commandType.StoredProcedure;
adapter.InsertCommand.Parameters.Add(new SqlParameter("@CategoryName",
SqlDbType.NVarChar, 15,"CategoryName"));
You need to retrieve the identity value for the newly created record. Which code segment should you add?

A) SqlParameter parameter = adapter.InsertCommand.Parameters.Add("@CategoryName", SqlDbType.Int); parameter.Direction = ParameterDirection.Output; parameter = adapter.InsertCommand.Parameters.Add("@Identity", SqlDbType.Int, 0, "CategoryID"); parameter.Direction = ParameterDirection.Output;
B) SqlParameter parameter = adapter.InsertCommand.Parameters.Add("@RowCount", SqlDbType.Int); parameter.Direction = ParameterDirection.ReturnValue; parameter = adapter.InsertCommand.Parameters.Add("@Identity", SqlDbType.Int, 0, "CategoryID"); parameter.Direction = ParameterDirection.Output;
C) SqlParameter parameter = adapter.InsertCommand.Parameters.Add("@RowCount", SqlDbType.Int);
parameter.Direction = ParameterDirection.Output;
parameter = adapter.InsertCommand.Parameters.Add("@Identity", SqlDbType.Int, 0, "CategoryID");
parameter.Direction = ParameterDirection.ReturnValue;
D) SqlParameter parameter = adapter.InsertCommand.Parameters.Add("@CategoryName", SqlDbType.Int); parameter.Direction = ParameterDirection.Output; parameter = adapter.InsertCommand.Parameters.Add("@Identity", SqlDbType.Int, 0, "CategoryID"); parameter.Direction = ParameterDirection.ReturnValue;

5. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to create an application.
The application connects to two different Microsoft SQL Server 2008 database servers named Server1 and
Server2.
A string named sql1 contains a connection string to Server1. A string named sql2 contains a connection
string to Server2.
01 using (TransactionScope scope = new
02 ...
03 )
04 {
05 using (SqlConnection cn1 = new SqlConnection(sql1))
06 {
07 try{
08 ...
09 }
10 catch (Exception ex)
11 {
12 }
13 }
14 scope.Complete();
15 }
You need to ensure that the application meets the following requirements:
-There is a SqlConnection named cn2 that uses sql2.
-The commands that use cn1 are initially enlisted as a lightweight transaction.
The cn2 SqlConnection is enlisted in the same TransactionScope only if commands executed by cn1 do not
throw an exception.
What should you do?

A) Insert the following code segment at line 02.
TransactionScope(TransactionScopeOption.RequiresNew)
Insert the following code segment at line 08.
cn1.Open();
...
using (SqlConnection cn2 = new SqlConnection(sql2))
{
try
{
cn2.Open();
...
}
catch (Exception ex){}
}
B) Insert the following code segment at line 02.
TransactionScope(TransactionScopeOption.Suppress)
Insert the following code segment at line 08.
using (SqlConnection cn2 = new SqlConnection(sql2))
{
try
{
cn2.Open();
...
cn1.Open();
...
}
catch (Exception ex){}
}
C) Insert the following code segment at line 02.
TransactionScope(TransactionScopeOption.Suppress)
Insert the following code segment at line 08.
cn1.Open();
...
using (SqlConnection cn2 = new SqlConnection(sql2))
{
try
{
cn2.Open();
...
}
catch (Exception ex){}
}
D) Insert the following code segment at line 02.
TransactionScope(TransactionScopeOption.RequiresNew)
Insert the following code segment at line 08.
using (SqlConnection cn2 = new SqlConnection(sql2)) {
try{
cn2.Open();
...
cn1.Open();
...
}
catch (Exception ex){}
}

Solutions: