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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 develop an application.
You use the ADO.NET Entity Framework Designer to model entities. You retrieve an entity from an object
context.
A different application updates the database. You need to update the entity instance to reflect updated
values in the database.
Which line of code should you use?

A) context.AcceptAllChanges() ;
B) context.LoadProperty(entity, "Client", MergeOption.OverwriteChanges);
C) context.Refresh(RefreshMode.StoreWins, entity);
D) context.LoadProperty(entity, "Server", MergeOption.OverwriteChanges);

2. You use Microsoft .NET Framework 4.0 to develop an application that uses the Entity Framework.
The application defines the following Entity SQL (ESQL) query, which must be executed against the mode.
string prodQuery = "select value p from Products as p where
p.ProductCategory.Name = @p0";
You need to execute the query. Which code segment should you use?

A) var prods = ctx.ExecuteStoreQuery<Product>(prodQuery, new ObjectParameter("p0", "Road Bikes")).ToList();
B) var prods = ctx.ExecuteFunction<Product>(prodQuery, new ObjectParameter("p0", "Road Bikes")).ToList();
C) var prods = ctx.ExecuteStoreCommand(prodQuery, new ObjectParameter("p0", "Road Bikes")).ToList();
D) var prods = ctx.CreateQuery<Product>(prodQuery, new ObjectParameter("p0", "Road Bikes")).ToList();

3. You use Microsoft .NET Framework 4.0 to develop an application that uses WCF Data Services to persist entities from the following Entity Data Model.

You create a new Blog instance named newBlog and a new Post instance named newPost as shown in the
following code segment.
(Line numbers are included for reference only.)
01 Blog newBlog = new Blog();
02 Post newPost = new Post();
03 ....
04 Uri serviceUri = new Uri("...");
05 BlogsEntities context = new BlogsEntities(serviceUri);
06 ....
You need to ensure that newPost is related to newBlog through the Posts collection property and that
newPost and newBlog are sent to the service.
Which code segment should you insert at line 06?

A) newBlog.Posts.Add(newPost); context.AddToBlogs(newBlog); context.AddToPosts(newPost); context.SaveChanges(SaveChangesOptions.Batch);
B) newBlog.Posts.Add(newPost); context.UpdateObject(newBlog); context.UpdateObject(newPost); context.SaveChanges(SaveChangesOptions.Batch);
C) newBlog.Posts.Add(newPost); context.AttachTo("Blogs", newBlog); context.AttachTo("Posts", newPost); context.SaveChanges(SaveChangesOptions.Batch);
D) context.AttachLink(newBlog, "Posts", newPost); context.SaveChanges(SaveChangesOptions.Batch) ;

4. There are Entities - States Class, Cities class. Deleting of state id raises exception. Which of the following?

A) EntityUpdateException
B) EntityException
C) ConstraintException
D) UpdateException

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 2008 database. You add the following store procedure
to the database.
CREATE PROCEDURE GetSalesPeople AS BEGIN
SELECT FirstName, LastName, Suffix, Email, Phone FROM SalesPeople END
You write the following code segment. (Line numbers are included for reference only.)
01 SqlConnection connection = new SqlConnection("...");
02 SqlCommand command = new SqlCommand("GetSalesPeople", connection);
03 command.CommandType = CommandType.StoredProcedure;
04 ...
You need to retreive all of the results from the stored procedure. Which code segment should you insert at line 04?

A) var res = command.ExecuteNonQuery();
B) var res = command.ExecuteReader();
C) var res = command.ExecuteScalar();
D) var res = command.ExecuteXmlReader();

Solutions: