Warm start-up and Cold start-up

Warm start up
-time taken to start application that launched in the recent past (no reboot in between)
(just like the time taken to do something after woke up from long sleep)

Cold start up
-the time taken to start application after machine reboot, i.e. the first launch after reboot.
-depends on the number of pager need to be fetched from disk.
(just like the time taken to do something after reborn)