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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.
The application connects to a Microsoft SQL Server database. The application uses DataContexts to query
the database.
The application meets the following requirements:
-Stores customer data offline.
-Allows users to update customer records while they are disconnected from the server.
-Enables offline changes to be submitted back to the SQL Server by using the DataContext object.
You need to ensure that the application can detect all conflicts that occur between the offline customer information submitted to the SQL Server and the server version. You also need to ensure that you can roll back local changes. What should you do?

A) Add a try/catch statement around calls to the SubmitChanges method of the DataContext object and catch SqlExceptions.
B) Call the SubmitChanges method of the DataContext object. Pass System.Data.Linq.ConflictMode.ContinueOnConflict to the method.
C) Add a try/catch statement around calls to the SubmitChanges method of the DataContext object and catch ChangeConflictExceptions.
D) Override the Update operation of the DataContext object. Call the ExecuteDynamicUpdate method to generate the update SQL.

2. How do you call a model-defined function as static method on a custom class?

A) Add a class to your application with a static method that does the following: Apply an EdmFunctionAttribute to the method and ensure it accepts IEntityWithRelationships argument and returns the results of the Execute method that is returned by the Provider property.
B) Add a class to your application with a static method that does the following: Apply an EdmFunctionAttribute to the method and ensure it accepts an IQueryable argument and returns the results of the Execute method that is returned by the Provider property.
C) Add a class to your application with a static method that does the following: Apply an EdmFunctionAttribute to the method and ensure it accepts and returns the results of the Execute method that is returned by the Provider property.
D) Add a class to your application with a static method that does the following: Apply an EdmFunctionAttribute to the method and ensure it accepts ICollection argument and returns the results of the Execute method that is returned by the Provider property.

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 2008 database. The application uses DataContexts to
query the database.
You create a function that meets the following requirements:
-Updates the Customer table on the database when a customer is marked as deleted.
-Updates the related entries in other tables (CustomerAddress, CustomerContacts) by marking them as deleted.
-Prevents consumer code from setting the Deleted column's value directly.
You need to ensure that the function verifies that customers have no outstanding orders before they are
marked as deleted.
You also need to ensure that existing applications can use the update function without requiring changes in
the code.
What should you do?

A) Override the Delete operation of the DataContext object.
B) Override the Update operation of the DataContext object.
C) Add new entities to the DataContext object for the Customers and Orders tables.
D) Modify the SELECT SQL statement provided to the DataContext object to use an INNER JOIN between the Customer and Orders tables.

4. You develop a Microsoft .NET application that uses Entity Framework to store entities in a Microsft SQL
Server 2008 database.
While the application is disconnected from the database, entities that are modified, are serialized to a local
file.
The next time the application connects to the database, it retrieves the identity from the database by using
an object context
named context and stores the entity in a variable named remoteCustomer.
The application then serializes the Customer entity from the local file and stores the entity in a variable
named localCustomer.
The remoteCustomer and the localCustomer variables have the same entity key.
You need to ensure that the offline changes to the Customer entity is persisted in the database when the
ObjectContext.SaveChanges() method is called.
Which line of code should you use?

A) context.ApplyOriginalValues("Customers", remoteCustomer);
B) context.ApplyCurrentValues("Customers", remoteCustomer);
C) context.ApplyOriginalValues("Customers", localCustomer);
D) context.ApplyCurrentValues("Customers", localCustomer);

5. 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.
You need to create a database from your model. What should you do?

A) Run the edmgen.exe tool in FromSSDLGeneration mode.
B) Run the edmgen.exe tool in FullGeneration mode.
C) Use the Update Model Wizard in Visual Studio.
D) Use the Generate Database Wizard in Visual Studio. Run the resulting script against a Microsoft SQL Server database.

Solutions: