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Question 4: You create an application by using the Microsoft .NET Framework 3.5 and Microsoft ADO.NET. The
application connects to a Microsoft SQL Server 2005 database.
You write the following code segment. (Line numbers are included for reference only.)
01 using (SqlConnection connection = new
SqlConnection(connectionString)) {
02 SqlCommand cmd = new SqlCommand(queryString, connection);
03 connection.Open();
04
05 while (sdrdr.Read()){
06 // use the data in the reader
07 }
08 }
You need to ensure that the memory is used efficiently when retrieving BLOBs from the database.
Which code segment should you insert at line 04?
A. SqlDataReader sdrdr = cmd.ExecuteReader();
B. SqlDataReader sdrdr = cmd.ExecuteReader(CommandBehavior.Default);
C. SqlDataReader sdrdr = cmd.ExecuteReader(CommandBehavior.SchemaOnly);
D. SqlDataReader sdrdr = cmd.ExecuteReader(CommandBehavior.SequentialAccess);
Correct Answer: D