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

Question 1

The database contains orphaned Color records that are no longer connected to Part records.
You need to clean up the orphaned records. You have an existing ContosoEntities context object named
context.
Which code segment should you use?

A. context.Colors.TakeWhile(c => !c.Parts.Any()); context.SaveChanges();
B. context.Colors.ToList().RemoveAll(c => !c.Parts.Any()); context.SaveChanges();
C. var unusedColors = context.Colors.Where(c => !c.Parts.Any()).ToList(); foreach (var unused in unusedColors){
context.DeleteObject(unused)
}
context.SaveChanges();
D. var unusedColors = context.Colors.Where(c => !c.Parts.Any()); context.DeleteObject(unusedColors); context.SaveChanges();

Question 2

You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to create a Windows
Communication Foundation (WCF) Data Services service.
The service connects to a Microsoft SQL Server 2008 database. The service is hosted by an Internet
Information Services (IIS) 6.0 server.
You need to ensure that applications authenticate against user information stored in the database before
the application is allowed to use the service.
Which two actions should you perform? (Each correct answer presents part of the solution. Choose two.)

A. Enable the WCF Authentication Service.
B. Configure IIS to require Windows authentication.
C. Configure IIS to require basic authentication.
D. Configure IIS to allow anonymous access.
E. Modify the Data Services service to use a Microsoft ASP.NET membership provider.

Question 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 Entity SQL to retrieve data from the
database.
You need to find out whether a collection is empty. Which entity set operator should you use?

A. IN
B. ANYELEMENT
C. EXISTS
D. EXCEPT

Question 4

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

Question 5

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.ReturnValue;
B. 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;
C. 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;
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.Output;

Solutions: