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Microsoft UPG:Transition MCPD.NET Frmwrk 3.5 Web Dev to 4 Web Dev Sample Questions:

1. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4 to create an application. The application connects to a Microsoft SQL Server 2008 database. The database includes a table named dbo. Documents that contains a column with large binary dat a. You are creating the Data Access Layer (DAL). You add the following code segment to query the dbo.Documents table. (Line numbers are included for reference only.)
01public void LoadDocuments(DbConnection cnx)
02{
03var cmd = cnx.CreateCommand();
04cmd.CommandText = "SELECT * FROM dbo.Documents";
05...
06cnx.Open();
08ReadDocument(reader); }
You need to ensure that data can be read as a stream. Which code segment should you insert at line 07?

A) var reader = cmd.ExecuteReader(CommandBehavior.KeyInfo);
B) var reader = cmd.ExecuteReader(CommandBehavior.Default);
C) var reader = cmd.ExecuteReader(CommandBehavior.SequentialAccess);
D) var reader = cmd.ExecuteReader(CommandBehavior.SchemaOnly);

2. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4 to create an application. The
application connects to a Microsoft SQL Server database.
You create the classes shown in the following exhibit.
You add the following code segment to the application. (Line numbers are included for reference only.)
01 public void QueryPlayers(List <League> leagues) {
02
03 }
You create a LINQ query to retrieve a collection of Player objects.
You need to ensure that the collection includes all the players from each team and every league.
Which code segment should you insert at line 02?

A) var query = leagues.SelectMany(l => l.Teams.Select(t => t.Players));
B) var query = leagues.Select(l => l.Teams.Select(t => t.Players));
C) var query = leagues.Select(l => l.Teams.SelectMany(t => t.Players));
D) var query = leagues.SelectMany(l => l.Teams.SelectMany(t => t.Players));

3. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4 to create an application. The
application connects to a Microsoft SQL Server database. The application uses the following object query
to load a product from the database. (Line numbers are included for reference only.)
01using (AdventureWorksEntities advWorksContext = new AdventureWorksEntities())
02{
03ObjectQuery <Product> productQuery = advWorksContext.Product.Where("it.ProductID = 900");
04
05}
You need to log the command that the query executes against the data source. Which code segment
should you insert at line 04?

A) Trace.WriteLine(((IQueryable)productQuery).Expression);
B) Trace.WriteLine(productQuery.ToTraceString());
C) Trace.WriteLine(productQuery.CommandText);
D) Trace.WriteLine(productQuery.ToString());

4. You are designing an ASP.NET Web Forms application that uses a database containing user names and
hashed passwords for authentication. The Web application includes a login form in which users type their
user names and passwords.
You need to design a strategy to ensure that the user's login credentials cannot be stolen through a man-
in-the-middle attack.
Which approach should you recommend?

A) Write an onSubmit JavaScript handler that hashes the password before the password is submitted to the server.
B) Write an OnClick method for the Submit button that hashes the password before the password is compared with the password value that is stored in the database.
C) Install a certificate on the Web server, and force the login form to use SSL.
D) Write an onSubmit JavaScript handler that URL-encodes the password before the password is passed to the server.

5. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4 to create an application. The application connects to several SQL Server databases. You create a function that modifies customer records that are stored in multiple databases. All updates for a given record are performed in a single transaction. You need to ensure that all transactions can be recovered. What should you do?

A) Call the Reenlist method of the TransactionManager class.
B) Call the EnlistDurable method of the Transaction class.
C) Call the EnlistVolatile method of the Transaction class.
D) Call the RecoveryComplete method of the TransactionManager class.

Solutions: