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

1. You are developing a WCF data service that will expose an existing Entity Data Model (EDM). You have the following requirements:
-Users must be able to read all entities that are exposed in the EDM.
-Users must be able to update or replace the SalesOrderHeader entities.
-Users must be prevented from inserting or deleting the SalesOrderHeader entities
You need to ensure that the data service meets the requirements. Which code segment should you use in the Initialize method?

A) config.SetEntitySetAccessRule("*", EntitySetRights.AllRead); config.SetEntitySetAccessRule("SalesOrderHeader", EntitySetRights.AllWrite);
B) config.SetEntitySetAccessRule("*", EntitySetRights.AllRead); config.SetEntitySetAccessRule("SalesOrderHeader", EntitySetRights.WriteAppend |
EntitySetRights.WriteDelete);
C) config.SetEntitySetAccessRule("*", EntitySetRights.AllRead); config.SetEntitySetAccessRule("SalesOrderHeader", EntitySetRights.All);
D) config.SetEntitySetAccessRule("*", EntitySetRights.AllRead); config.SetEntitySetAccessRule("SalesOrderHeader", EntitySetRights.WriteMerge | EntitySetRights.WriteReplace);

2. 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 your entities.
You use Plain Old CLR Objects (POCO) entities along with snapshot-based change tracking. The code
accesses the POCO entities directly.
You need to ensure that the state manager synchronizes when changes are made to the object graph.
Which ObjectContext method should you call?

A) Refresh
B) SaveChanges
C) DetectChanges
D) ApplyPropertyChanges

3. You use Microsoft .NET Framework 4.0 to develop an application that connects to a Microsoft SQL Server
2008 database.
You add the following stored procedure to the database.
CREATE PROCEDURE dbo.GetClassAndStudents AS BEGIN
SELECT * FROM dbo.Class
SELECT * FROM dbo.Student
END
You create a SqIConnection named conn that connects to the database.
You need to fill a DataSet from the result that is returned by the stored procedure.
The first result set must be added to a DataTable named Class, and the second result set must be added to
a DataTable named Student.
Which code segment should you use?

A) DataSet ds = new DataSet(); SqlDataAdapter ad = new SqlDataAdapter("GetClassAndStudents", conn); ad.MissingMappingAction = MissingMappingAction.Ignore; ad.Fill(ds, "Class"); ad.Fill(ds, "Student");
B) DataSet ds = new DataSet(); SqlDataAdapter ad = new SqlDataAdapter("GetClassAndStudents", conn); ad.TableMappings.Add("Table", "Class"); ad.TableMappings.Add("Table1", "Student") ; ad.Fill(ds) ;
C) DataSet ds = new DataSet(); SqlDataAdapter ad = new SqlDataAdapter("GetClassAndStudents", conn); ds.Tables.Add("Class"); ds.Tables.Add("Student"); ad.Fill(ds);
D) DataSet ds = new DataSet(); SqlDataAdapter ad = new SqlDataAdapter("GetClassAndStudents", conn); ad.Fill(ds);

4. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to develop an application.
You use the ADO.NET Entity Framework Designer to model entities.
The application includes self-tracking entities as shown in the following diagram.

There is a Person entity names person1 that has TrackChanges turned on.
You need to delete all e-mail addresses that are associated with person1 by using an ObjectContext.
What are two possible code segments that you can use to achieve this goal?
(Each correct answer presents a complete solution. Choose two).

A) person1.EMailAddresses = new TrackableCollection<EMailAddress>(); context.SaveChanges();
B) foreach(var email in person1.EMailAddresses){
email.MarkAsDeleted();
}
context.SaveChanges();
C) person1.EMailAddresses = null; context.SaveChanges();
D) while(person1.EMailAddresses.Count>0){
person1.EmailAddresses.RemoveAt(0);
}
context.SaveChanges();

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

Solutions: