Interview's flow:
1. Check and ask your employment letters, education certificates' copies strictly but you're not getting an offer at this moment
2. Department interview
3. Written test
4. HR interview
Overall comment:
Though it is a MNC while the whole interview make me feel like a traditional local company (if you're Hong Konger you may understand)
Ask for what you can contribute to company
Try to ask you lower your expected salary "bottom line" (which is already mentioned your expected salary in CV before interview, not sure their budget is lower then that or not)
The whole interview procedure makes me feel that I'm not applying a work at MNC