Guys, when it comes to the interview, just don't B.S. If you like the 777, tell the honestly and why. If you don't like any of CX aircrafts at all, tell them honestly as well. Not that you should be there in the first place.
About the TOD question. You shouldn't need a whiteboard to explain the answer. The normal TOD point for a jet is 3 times altitude about ground plus whatever miles you need for configure. If you use speedbrakes, you can use the rule of thumb, 2 times altitude plus whatever miles needed for configuration. Remember, you should be able to do this in you head. If you are flying a jet now and ATC ask you how many miles do you need, are you seriously going to pull out a whiteboard? keep everything as simple as possible