My sister has been to both Tiger and Jetstar recruitment days and here is some advice:
-Have some knowledge of the operation -fleet is A320's and they fit 180 revenue seats.
-The first announced routes so far are Gold Coast and Sydney Daily services. Could be usefull if they ask you to see if you know.
- Initially 1 new A320 is to be based in AKL
-JQ is the IATA code
-Have some idea of the JQ routes already served to New Zealand perhaps, ie-they use Christchurch to Australian Mainland already
-Jetstar uses A320's/A321's and A330's.
Basically just relax and you will be fine...everyone is nervous