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Microsoft 070-516 Exam Syllabus Topics:

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 that uses the ADO.NET Entity Framework to model entities. You create an entity model as shown in the following diagram.

You need to ensure that all Person entities and their associated EmailAddresses are loaded. Which code segment should you use?

A) var people = context.People.Except(new ObjectQuery<Person>("EmailAddresses", context)).ToList();
B) var people = context.People.Include("Person.EmailAddresses").ToList();
C) var people = context.People.Except(new ObjectQuery<Person>("Person.EmailAddresses", context)).ToList();
D) var people = context.People.Include("EmailAddresses").ToList();

2. You are developing a new feature that displays an auto-complete list to users as the type color names. You
have an
existing ContosoEntities context object named contex.
To support the new feature you must develop code that will accept a string object named text containing a
user's
partial input and will query the Colors database table to retrieve all color names that begin with that input.
You need to create an Entity SQL (ESQL) query to meet the requirement.
The query must not be vulnerable to a SQL injection attack. Which code segment should you use?

A) var parameter = new ObjectParameter("text", text + "%");
var result = context.CreateQuery<string>(
"SELECT VALUE (c.Name) FROM Colors AS c WHERE c.Name LIKE @text",
parameter);
B) var parameter = new ObjectParameter("text", text + "%");
var result = context.CreateQuery<string>( "SELECT (c.Name) FROM Colors AS c WHERE c.Name LIKE @text", parameter);
C) var parameter = new ObjectParameter("text", HttpUtility.HtmlEncode(text) + "%"); var result = context.CreateQuery<string>(
"SELECT (c.Name) FROM Colors AS c WHERE c.Name LIKE '@text'@, parameter);
D) var parameter = new ObjectParameter("text", text + "%"); var result = context.CreateQuery<string>(
"SELECT VALUE (c.Name) FROM Colors AS c WHERE c.Name LIKE '@text'", parameter);

3. You use Microsoft Visual Studio 2010 and .NET Framework 4.0 to create an application.
The application connects to a Microsoft SQL Server 2008 database. The application contains the following
code segment.
string SQL = string.Format("SELECT * FROM Customer WHERE CompanyName LIKE '%
{0}%', companyName);
var cmd = new SqlCommand(SQL, con);
You need to reduce the vulnerability to SQL injection attacks. Which code segment should you use?

A) string SQL = "SELECT * FROM Customer Where " + "CompanyName LIKE @companyName"; var cmd = new SqlCommand(SQL,con); var param = new SqlParameter ("@companyName", string.Format("%{0}%", companyName));
B) string SQL = "SELECT" * FROM Customer @companyName; var cmd = new sqlcommand(SQL,con); cmd.Parameters.AddWithValue("companyName", string.format("where companyName LIKE '%{0}%'", companyName));
C) string SQL = "SELECT * FROM Customer Where " + "CompanyName LIKE @companyName"; var cmd = new SqlCommand(SQL,con); cmd.Parameters.AddWithValue("@companyName", string.Format("%{0}%", companyName));
D) string SQL = string.Format("SELECT * FROM " + " Customer Where CompanyName LIKE {0}",
new SqlCommand("@companyName", string.format("%{0}%", companyName))); var cmd = new SqlCommand(SQL, con);

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

5. You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to create an application.
You are creating the data layer of the application. You write the following code segment.
(Line numbers are included for reference only.)
01 public static SqlDataReader GetDataReader(string sql)
02 {
03 SqlDataReader dr = null;
04 ...
05 return dr;
06 }
You need to ensure that the following requirements are met: The SqlDataReader returned by the GetDataReader method can be used to retreive rows from the database.
--
SQL connections opened within the GetDataReader method will close when the SqlDataReader is closed.
Which code segment should you insert at the line 04?

A) using(SqlConnection cnn = new SqlConnection(strCnn)) { try { SqlCommand cmd = new SqlCommand(sql, cnn); cnn.Open(); dr = cmd.ExecuteReader(); } catch {
throw;
}
}
B) SqlConnection cnn = new SqlConnection(strCnn); SqlCommand cmd = new SqlCommand(sql, cnn); cnn.Open(); { try { dr = cmd.ExecuteReader(); cnn.Close(); } catch {
throw;
}
}
C) SqlConnection cnn = new SqlConnection(strCnn); SqlCommand cmd = new SqlCommand(sql, cnn);
cnn.Open();
{
try
{
dr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
}
catch
{
cnn.Close();
throw;
}
}
D) SqlConnection cnn = new SqlConnection(strCnn); SqlCommand cmd = new SqlCommand(sql, cnn); cnn.Open(); { try { dr = cmd.ExecuteReader(); } finally {
cnn.Close();
}
}

Solutions: