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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 2008 database. The application uses a Microsoft ADO.NET SQL Server managed provider.
"Data Source=myServerAddress; Initial Catalog=myDataBase; User Id=myUsername; Password=secret;"
You need to ensure that the database credentials are secure. Which is the correct Property to insert?

A) Persist Security Info=true;
B) Persist Security Info=false;
C) Integrated Security=false;
D) Integrated Security=SSPI;

2. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to create an application. The application retreives data from Microsoft SQL Server 2008 database named AdventureWorks. The AdventureWorks.dbo.ProductDetails table contains a column names ProductImages that uses a varbinary(max) data type.
You write the following code segment. (Line numbers are included for reference only.)
01 SqlDataReader reader = command.ExecureReader(--empty phrase here --);
02 while(reader.Read())
03 {
04 pubID = reader.GetString(0);
05 stream = new FileStream(...);
06 writer = new BinaryWriter(stream);
07 startIndex = 0;
08 retval = reader.GetBytes(1, startIndex, outByte, 0, bufferSize);
09 while(retval == bufferSize)
10 {
11 ...
12 }
13 writer.Write(outbyte, 0, (int)retval-1);
14 writer.Flush();
15 writer.Close();
16 stream.Close();
17 }
You need to ensure that the code supports streaming data from the ProductImages column. Which code segment should you insert at the empty phrase in line 01?

A) CommandBehavior.Default
B) CommandBehavior.SingleResult
C) CommandBehavior.SequentialAccess
D) CommandBehavior.KeyInfo

3. 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) Use System.Security.Cryptography.DES to encrypt all the row values using an encryption key held by the application.
B) 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.
C) Use System.Security.Cryptography.RSA to encrypt all the row values. Publish only the key internally.
D) 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.

4. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to develop an application that
uses the Entity Framework.
You create an Entity Data Model (EDM) named Model. You need to ensure that the Storage Schema
Definition Language (SSDL)
of the EDM can be modified without rebuilding the application. What should you do?

A) Set the Metadata Artifact Processing property to Embed in Output Assembly and use the following connection string: metadata=res://*/Model.csdl| res://*/Model.ssdl| res://*/Model.msl; provider=System.Data.SqlClient; provider connection string="& "
B) Set the Metadata Artifact Processing property to Embed in Output Assembly and use the following connection string: metadata=.\Model.csdl| .\Model.ssdl| .\Model.msl; provider=System.Data.SqlClient; provider connection string="& "
C) Set the Metadata Artifact Processing property to Copy to Output Directory and use the following connection string: metadata=res://*/Model.csdl| res://*/Model.ssdl| res://*/Model.msl; provider=System.Data.SqlClient; provider connection string ="& "
D) Set the Metadata Artifact Processing property to Copy to Output Directory and use the following connection string: metadata=.\Model.csdl| .\Model.ssdl| .\Model.msl; provider=System.Data.SqlClient; provider connection string ="& "

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.
The application uses the following object query to load a product from the database.
(Line numbers are included for reference only.)
01 using (AdventureWorksEntities advWorksContext = new AdventureWorksEntities
())
02 {
03 ObjectQuery <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.ToString());
D) Trace.WriteLine(productQuery.CommandText);

Solutions: