70-516 試験問題を無料オンラインアクセス

Which one of these samples it the correct way to close the connection using Command Behavior?

• A.using (SqlDataReader rdr = new SqlDataReader())
  {
  string sql = @"sql statement";
  SqlConnection conn = connection.GetConnection();
  SqlCommand cmd = new SqlCommand(sql, conn);
  SqlDataReader rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
  Console.WriteLine("{0}", rdr);
  }
• B.SqlDataReader rdr = new SqlDataReader(); string sql = @"sql statement"; SqlConnection conn = connection.GetConnection(); SqlCommand cmd = new SqlCommand(sql, conn); SqlDataReader rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection); Console.WriteLine("{0}", rdr);
• C.SqlDataReader rdr = new SqlDataReader(); string sql = @"sql statement"; SqlConnection conn = connection.GetConnection(); SqlCommand cmd = new SqlCommand(sql, conn); SqlDataReader rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection); conn.Close(); Console.WriteLine("{0}", rdr);
• D.SqlDataReader rdr = new SqlDataReader(); string sql = @"sql statement"; SqlConnection conn = connection.GetConnection(); SqlCommand cmd = new SqlCommand(sql, conn); SqlDataReader rdr = cmd.ExecuteReader(CommandBehavior.CloseConnection); rdr.Close(); Console.WriteLine("{0}", rdr);

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 contains two
SqlCommand objects named cmd1 and cmd2.
You need to measure the time required to execute each command. Which code segment should you use?

• A.Stopwatch w1 = Stopwatch.StartNew(); cmd1.ExecuteNonQuery(); w1.Stop(); Trace.WriteLine(w1.ElapsedMilliseconds); w1 = Stopwatch.StartNew(); cmd2.ExecuteNonQuery(); w1.Stop(); Trace.WriteLine(w1.ElapsedMilliseconds);
• B.Stopwatch w1 = new Stopwatch(); w1.Start(); cmd1.ExecuteNonQuery(); w1.Stop(); Trace.WriteLine(w1.ElapsedMilliseconds); w1.Start(); cmd2.ExecuteNonQuery(); w1.Stop(); Trace.WriteLine(w1.ElapsedMilliseconds);
• C.Stopwatch w1 = Stopwatch.StartNew(); cmd1.ExecuteNonQuery(); w1.Stop(); Trace.WriteLine(w1.ElapsedMilliseconds); w1.Start(); cmd2.ExecuteNonQuery(); w1.Stop(); Trace.WriteLine(w1.ElapsedMilliseconds);
• D.Stopwatch w1 = new Stopwatch(); w1.Start(); cmd1.ExecuteNonQuery(); w1.Stop(); Trace.WriteLine(w1.ElapsedMilliseconds); w1.Reset(); cmd2.ExecuteNonQuery(); w1.Stop(); Trace.WriteLine(w1.ElapsedMilliseconds);

You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 to create a multi-tier application.
You use Microsoft ADO.NET Entity Data Model (EDM) to model entities.
The model contains entities named SalesOrderHeader and SalesOrderDetail.
For performance considerations in querying SalesOrderHeader, you detach SalesOrderDetail entities from
ObjectContext.
You need to ensure that changes made to existing SalesOrderDetail entities updated in other areas of your
application are persisted to the database.
Which two actions should you perform? (Each correct answer presents part of the solution. Choose two.)

• A.Call ObjectContext.ApplyCurrentValue.
• B.Call ObjectContext.ApplyOriginalValue.
• C.Re-attach the SalesOrderDetail entities.
• D.Set the MergeOption of SalesOrderDetail to MergeOptions.OverwriteChanges.
• E.Set the MergeOption of SalesOrderDetail to MergeOptions.NoTracking.

You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4.0 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 EnlistDurable method of the Transaction class.
• B.Call the RecoveryComplete method of the TransactionManager class.
• C.Call the Reenlist method of the TransactionManager class.
• D.Call the EnlistVolatile method of the Transaction class.

You use Microsoft .NET Framework 4.0 to develop an application. You use the XmlReader class to load
XML from a location that you do not control.
You need to ensure that loading the XML will not load external resources that are referenced in the XML.
Which code segment should you use?

• A.XmlReaderSettings settings = new XmlReaderSettings(); settings.ConformanceLevel = ConformanceLevel.Auto; XmlReader reader = XmlReader.Create("data.xml", settings);
• B.XmlReaderSettings settings = new XmlReaderSettings(); settings.CheckCharacters = true; XmlReader reader = XmlReader.Create("data.xml", settings);
• C.XmlReaderSettings settings = new XmlReaderSettings(); settings.XmlResolver = null; XmlReader reader = XmlReader.Create("data.xml", settings);
• D.XmlReaderSettings settings = new XmlReaderSettings(); settings.ValidationType = ValidationType.None; XmlReader reader = XmlReader.Create("data.xml", settings);