11. What Class.forName will do while loading drivers?

Answer
It is used to create an instance of a driver and register it with the DriverManager. When you have loaded a driver, it is available for making a connection with a DBMS

12. How can you make the connection?

Answer:

In establishing a connection is to have the appropriate driver connect to the DBMS. The following line of code illustrates the general idea:

13. How to update a ResultSet?

Answer:

You can update a value in a result set by calling the ResultSet.update method on the row where the cursor is positioned. The type value here is the same used when retrieving a value from the result set, for example, updateString updates a String value and updateDouble updates a double value in the result set.  rs.first();
updateDouble("balance", rs.getDouble("balance") - 5.00);
The update applies only to the result set until the call to rs.updateRow(), which updates the underlying database.
To delete the current row, use rs.deleteRow().
To insert a new row, use rs.moveToInsertRow().

14. How can you load the drivers?

Answer
Loading the driver or drivers you want to use is very simple and involves just one line of code. If, for example, you want to use the JDBC-ODBC Bridge driver, the following code will load it:

Your driver documentation will give you the class name to use. For instance, if the class name is jdbc.DriverXYZ , you would load the driver with the following line of code: