It is necessary knowldege to understand fire vs. smoke indication vs. self-induced warning with regards to the cargo systems. It is good knowledge to be aware that warning lights may extinguish because of the power-down, and not make hasty conclusions.
Any fire-on-ground scenario is testing the pilots well beyond the scope of technical aircraft & systems handling, it is typically an excercise on information management.
The trick, beyond the books (*) on the A320 for this one, is to start the APU. The options once vacated off the runway are greatly expanded then. Probably not type specific at all. The rest had already been said.
* = why is it NOT mentioned is a question of its own!
my 3c.