According to Marissa Mayer
1. Understanding of how to apply technology.
Someone that could answer something like “Hey, I see this trend happening with this technology. This would mean that we will be able to do this and that in the near future.” Hence, the question “What’s the coolest thing you’ve seen in the last 6 months and what long term implications do you think it will have?”. Be curious.
2. Humbleness.
3. Being a good listener. Win the respect of people you will be working with: taking notes, getting resources for the team, scheduling meetings, etc.
4. Data driven.