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

1. You use Microsoft Visual Studio 2010 and .NET Framework 4.0 to enhance and existing application use
Entity Framework.
The classes that represent the entites in the model are Plain old CLR Object (POCO) Classes.
You need to connect the existing POCO classes to an entity framework context. What should you do?

A) 1. Generate an Entity Data Model for the POCO classes.
2.Create an ObjectSet for the POCO classes.
3.Set Code Generation Strategy on the Entity Data Model to none.
4.Create an ObjectContext for the model.
B) 1. Generate a MetadataWorkspace and create an ObjectContext for the model.
2.Disable Proxy object creation on the ContextOptions of the ObjectContext.
3.Enable lazy loading on the ContextOptions of the ObjectContext.
C) 1. Generate an Entity Data Model fort he POCO classes.
2.Create an ObjectSet fort he POCO classes.
3.Disable Proxy object creation on the ContextOptions of the ObjectContext.
4.Enable lazy loading on the ContextOptions of the ObjectContext.
D) 1. Generate a MetadataWorkspace and create an ObjectContext for the model.
2.Create an ObjectSet fort he POCO classes.
3.Disable Proxy object creation on the ContextOptions of the ObjectContext.

2. You add a table to the database to track changes to part names. The table stores the following row values:
-the username of the user who made the change
-a part ID
-the new part name
-a DateTime value
You need to ensure detection of unauthorized changes to the row values.
You also need to ensure that database users can view the original row values.

A) Add a column named signature. Use System.Security.Cryptography.RSA to create a signature for all of the row values. Store the signature in the signature column. Publish only the public key internally.
B) Use System.Security.Cryptography.DES to encrypt all the row values using an encryption key held by the application.
C) Add a column named hash. Use System.Security.Cryptography.MD5 to create an MD5 hash of the row values, and store in the hash column.
D) Use System.Security.Cryptography.RSA to encrypt all the row values. Publish only the key internally.

3. 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.
You need to ensure that the entities are self-tracking. What should you do in the ADO.NET Entity
Framework Designer?

A) Change the Transform Related Text Templates On Save option to False.
B) Add an ADO.NET Self-Tracking Entity Generator to the model.
C) Change the Code Generation Strategy option from Default to None.
D) Add an ADO.NET EntityObject Generator to the model.

4. The user interface requires that a paged view be displayed of all the products sorted in alphabetical order.
The user interface supplies a current starting index and a page size in variables named startIndex and
pageSize of type int.
You need to construct a LINQ expression that will return the appropriate Parts from the database from an
existing
ContosoEntities context object named context. You begin by writing the following expression:
context.Parts
Which query parts should you use in sequence to complete the expression?
(To answer, move the appropriate actions from the list of actions to the answer area and arrange them in
the correct order.)

A) .Take(pageSize);
B) .Skip(pageSize)
C) .OrderBy(x => x.Name)
D) .Skip(startIndex)
E) .Take(startIndex)

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.
The application allows users to make changes to entities while disconnected from the central data store.
You need to ensure that when the user connects to the central data store and retrieves new data, the application meets the following requirements:
-Changes made to the local data store in disconnected mode are preserved.
-Entities that have already been loaded into the local data store, but have not been modified by the user,
are updated with the latest data. What should you do?

A) Call the query's Execute method by using the MergeOptions.AppendOnly option.
B) Call the Refresh method of ObjectContext by using the RefreshMode.ClientWins option.
C) Call the query's Execute method by using the MergeOptions.OverwriteChanges option.
D) Call the Refresh method of ObjectContext by using the RefreshMode.StoreWins option.

Solutions: