If they are doing Group Interview, there will be a few stages of elimination:-
1. Introduction - if u cant introduce yourself well, u will be eliminated on the spot
2. Group Activity (Most crucial) - They expect u to learn and adapt pretty fast, if u cant complete the task perfectly and on time.. u will be eliminated... This is where most candidates fail including me. They will not tell you what's wrong and no chance to redo the tasks. Maybe there's a reason why the reviews on Jobstreet are mostly appointing to their poor management and equal opportunity.
If u read this, goodluck with the interview :)