I got 2 phone screen in consequence 2 weeks(2012 Jan), but I didn't do very well, so no further contact till now. He ask about STA flow and some basic FlipFlop and Latch issue and set up/hold time and some concept of C++ when implement a graph. It's a timing analysis group and the interviewer is the group leader. In conclude, this kind of group will focus on graph Algorithm like DFS and coding ability like C++ and of course some digital design concept like I mention above. Hope it help!