Execution Trading Interview - Help Pls!!!

I have an interview next week with Nomura's head of execution trading (FT). The position is based in HK. I had two rounds already, and this will be the third round. It will be a phone interview.

For the first two interviews, I didn't really have technical questions...

What kind of questions(fit/technical) should I expect to get for this position? Also, I don't know much about execution trading...Can I get some ideas on this too?

Thanks