Firstly, if YKYap is your initial, change to another user ID to ask questions pertaining to SIA, people in SQ management may read this forum, don't forget this is open forum. You probably know mgt of Valuair is reading, so if happen that Valuair needs cadet pilots, never use your initial to ask questions, use something else, like A340, Stable Approach, etc.
Secondly, out in the first round is no big deal, still got 2nd chance, just try again few months down the road. So long as you haven't got rejected in the final round, you are still not written off yet.
Meanwhile, also its time to ponder your career options, flying can be exciting in the first 4-5 years, after that, you may get sick of it. There are FOs in SQ who leave after their bond is up cos they got sick of it, and its no longer the best paid job on Earth (at least not in Singapore)
Also, selection criteria may be more stringent nowadays, I heard from people in Jandakot that quite a number of cadets have been chopped recently, and all those there are extremely stressed, never know when is their turn.