What changes are required in web.config file to configure Web Farm ?
                +2 
                A: 
                
                
              Normally, when asked this in an interview, you will be expected to know that all machines in a web farm should have the same <machineKey>.
Read more details here (Generate Machine Key Elements for Web Farm).
                  Oded
                   2010-07-06 06:14:15
                
              You will also need to address Session management.  in-memory Session won't be shared across servers, so you either have to use the SQL mode, StateServer mode, or a custom provider: http://msdn.microsoft.com/en-us/library/ms178586.aspx
                  dave thieben
                   2010-07-06 15:54:18