Question:You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5.
You create a class that contains the following code segment:
01 public object GetCachedProducts(sqlConnection conn) {
02
03 if (Cache["products"] == null) {
04 SqlCommand cmd = new SqlCommand(
05 "SELECT * FROM Products", conn);
07 conn.Open();
08 Cache.Insert("products", GetData(cmd));
09 conn.Close();
10 }
11 return Cache["products"];
12 }
13
14 public object GetData(SqlCommand prodCmd) {
15 â–º
16 }
Each time a Web form has to access a list of products, the GetCachedProducts method is called to provide this list from
the Cache object.
You need to ensure that the list of products is always available in the Cache object.
Which code segment should you insert at line 15?
A return prodCmd.ExecuteReader();
SqlDataReader dr;
prodCmd.CommandTimeout = int.MaxValue;B dr = prodCmd.ExecuteReader();
return dr;C SqlDataAdapter da = new SqlDataAdapter();
da.SelectCommand = prodCmd;
DataSet ds = new DataSet();
return ds.Tables[0];D SqlDataAdapter da = new SqlDataAdapter(prodCmd);
DataSet ds = new DataSet();
da.Fill(ds);
return ds;
+ AnswerD
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