I echo Pac's earlier comment. Good luck to everyone at interviews this week.
Regarding the re-applying if unsuccessful. I believe, from what I can remember of the information session is that they keep your file on record for 2 years.
So you are able to re-apply. However, they may reject your application if you failed one of the steps.
This is what I took away from the information night. I may be well off the mark though so please don't hold this as fact.
If I am unsuccessful at my interview on Thursday I will still be re-applying next intake to try and put myself back in the mix.
All you can do is try and try again! Good luck!