In reply to the comment made by 'smugley', it is the filter interview I started this thread on but as it has progressed I realise the significance of OASC. That is the real test it seems.
I know that OASC consists of aptitude tests, fitness tests; numerical reasoning and leadership tests (please let me know if there is anything else). What is the best way to prepare for this in regards to books to read and ways to test myself?