I was in HKG two months ago and as far as the interview goes all the questions you'll find have been posted here in this forum. The questions (tech) are always changing because there are alot of different interviewers and they wont ask exactly the same questions everytime they do an interview.
All the q's I was asked I had either seen before (on here) or had come up from previous stuff that I should know from my flying so far. I'm no expert but my guess is that they're just as interested in how you come up with an answer and how you think as the answer itself.
As for the HR section of the interview there were no surprises
As for the sim, do a search on previous posts as its all still current.
Best of luck