Just for your referrence: Based on me and 2 others whom I got to know thru first interview, I was given the notice to attend the 2nd & 3rd interview 2 days later after my first. The other 2 had no replies until a week later and were told they are rejected.
As for the test, it is actually done on the 2nd interview. Went for some admin stuffs, submitting of documents and briefing.. etc etc. The next day will be SIT test, final interview cum tea party...
Hope this will be useful to you in due course dude!!.. Don't worry man, I thought I did badly for my 1st round too..
Regards.