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

2. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to create an application. The configuration file contains the following code segment.
<configuration> <connectionStrings> <add name="AdventureWorksLT" connectionString="DataSource=SQL01;InitialCatalog=AdventureWorksLT; IntegratedSecurity=True;" providerName="System.Data.SqlClient"/> </connectionStrings> </configuration>
You need to retrieve the connection string named AdventureWorksLT from the configuration file. Which line of code should you use?

A) varconnectionString=ConfigurationManager.ConnectionStrings["AdventureWorksLT"].Name;
B) varconnectionString=ConfigurationManager.AppSettings["AdventureWorksLT"];
C) varconnectionString=ConfigurationSettings.AppSettings["AdventureWorksLT"];
D) varconnectionString=ConfigurationManager.ConnectionStrings["AdventureWorksLT"].ConnectionString;

3. You are adding a process to the application. The process performs the following actions:
1.Opens a ContosoEntities context object named context1.
2.Loads a Part object into a variable named part1.
3.Calls the Dispose() method on context1.
4.Updates the data in part1.
5.Updates the database by using a new ContosoEntities context object named context2.
You need to update the database with the changed data from part1. What should you do?

A) Add the following code segment before calling SaveChanges() on context2:
context2.Attach(part1);
context2.ApplyCurrentValues("Parts", part1);
B) Add the following code segment before calling SaveChanges() on context2:
context2.Attach(part1);
context2.ObjectStateManager.ChangeObjectState(part1,
System.Data.EntitySate.Modified);
C) Add the following code segment before calling SaveChanges() on context2:
context2.ApplyOriginalValues("Parts", part1);
D) Add the following code segment before calling SaveChanges() on context2:
context2.ApplyCurrentValues("Parts", part1);

4. You use Microsoft .NET Framework 4.0 to develop an application that uses LINQ to SQL. The LINQ to SQL
model contains the Product entity.
A stored procedure named GetActiveProducts performs a query that returns the set of active products from
the database.
You need to invoke the stored procedure to return the active products, and you must ensure that the LINQ
to SQL context can track changes to these entities. What should you do?

A) Navigate to the GetActiveProducts stored procedure in Server Explorer, and drag the procedure onto the Product entity in the LINQ to SQL model designer surface.
B) Select the Product entity, view the entity's property window, and change the Source for the entity to GetActiveProducts.
C) Select the Product entity, view the entity's property window, and change the Name for the entity to GetActiveProducts.
D) Add a property named GetActiveProducts to the Product entity.

5. 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 over the network. The application uses data
from multiple related database tables.
You need to ensure that the application can be used if the connection is disconnected or unavailable.
Which object type should you use to store data from the database tables?

A) DataReader
B) Data Services
C) DataAdapter
D) DataSet

Solutions: