Speed and reliability of broadband, and to provide that you are looking at a fibre based solution. The future to the telecoms consumer is FTTH but that has challenges that a network /service provider you have to overcome
Why Facebook? This is a very cliche question but they want to start by understanding your motivation. Lots of people don’t really have clear ‘why’ they really want to work at FB so prep for this intro question. I was also expecting weird questions but they don’t do that anymore.
I just answered the first thoughts that came into my mind...I found that there were no trick questions so just keep it simple. I find short answers to be the best. If you start with a lot of fluff, you will lose them. BTW...the interviews are pretty short: 30 mins max.