In your opinion, which of these issues are more interesting?
And what will enable me to find a better job in the company?

Don't know, sorry. Anyone else?

If you are looking for a career in the industry, big data is one of the hottest areas. Cloud is also a hot topic, though a lot of it is about using technology that is already available, software reliability not so much - but software automation and decision making automation definitely hot

Well, Big Data is the official buzz word of our time. But it makes myself and many other academics want to scream. Like.. ugh.

What do you find more interesting? Have you identified a supervisor you can work with in these areas?

I wanna do a PhD research related to BIG DATA, any good suggestion? For computer science PhD, is it we must do lab test and experiment to prove the concepts or we can just theoretically analyze and do data collection using interview and case study?