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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.
You use the ADO.NET Entity Data Model (EDM) to define a Customer entity.
You need to add a new Customer to the data store without setting all the customer's properties. What
should you do?

A) Override the SaveChanges method for the Customer object.
B) Override the Create method for the Customer object.
C) Call the CreateObject method of the Customer object.
D) Call the Create method of the Customer object.

2. The application populates a DataSet object by using a SqlDataAdapter object.
You use the DataSet object to update the Categories database table in the database. You write the
following code segment.
(Line numbers are included for reference only.)
01 SqlDataAdapter dataAdpater = new SqlDataAdapter("SELECT CategoryID,
CategoryName FROM Categories", connection);
02 SqlCommandBuilder builder = new SqlCommandBuilder(dataAdpater);
03 DataSet ds = new DataSet();
04 dataAdpater.Fill(ds);
05 foreach (DataRow categoryRow in ds.Tables[0].Rows)
06 {
07 if (string.Compare(categoryRow["CategoryName"].ToString(), searchValue,
true) == 0)
08 {
09 ...
10 }
11 }
12 dataAdpater.Update(ds);
You need to remove all the records from the Categories database table that match the value of the
searchValue variable.
Which line of code should you insert at line 09?

A) categoryRow.Delete();
B) ds.Tables[0].Rows.Remove(categoryRow);
C) ds.Tables[0].Rows[categoryRow.GetHashCode()].Delete();
D) ds.Tables[0].Rows.RemoveAt(0);

3. The entity data model must be configured to provide a way you cal the sp_FindObsolete stored procedure. The returned data must implement the Descendants property.
In Visual Studio 2010, you open the Add functions Import dialog box from the EDMX diagram and enter the information shown in the following graphic.

You need to complete the configuration in the dialog box. What should you do?

A) In the Returns a Collection Of area, click Scalars and then, in the Scalars list, click Int32
B) Click the Get Column Information button, click Create New Complex Type and then, in the Complex box, enter Parts.
C) In the Returns a Collection Of area, click Scalars and then, in the Scalars list, click string
D) In the Returns a Collection Of area, click Entities and then, in the Entities list, click Component

4. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to create an application.
You use Plain Old CLR objects (POCO) to model your entities.
The application communicates with a Windows Communication Foundation (WCF) Data Services service.
You need to ensure that entities can be sent to the service as XML. What should you do?

A) Apply the [DataContract(IsReference = true)] attribute to the entities.
B) Apply the virtual keyword to the entity properties.
C) Apply the [DataContract(IsReference = false)] attribute to the entities.
D) Apply the [Serializable] attribute to the entities.

5. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to create a multi-tier application.
You use Microsoft ADO.NET Entity Data Model (EDM) to model entities.
The model contains entities named SalesOrderHeader and SalesOrderDetail.
For performance considerations in querying SalesOrderHeader, you detach SalesOrderDetail entities from
ObjectContext.
You need to ensure that changes made to existing SalesOrderDetail entities updated in other areas of your
application are persisted to the database.
Which two actions should you perform? (Each correct answer presents part of the solution. Choose two.)

A) Call ObjectContext.ApplyOriginalValue.
B) Set the MergeOption of SalesOrderDetail to MergeOptions.OverwriteChanges.
C) Set the MergeOption of SalesOrderDetail to MergeOptions.NoTracking.
D) Re-attach the SalesOrderDetail entities.
E) Call ObjectContext.ApplyCurrentValue.

Solutions: