While I'm applying for a manager position and played by my Indian manager, I appealed to his manager, VP of IT. He kept on asking me "Show me your managing skills".
I'm strong on technical so I know which developer is working hard or not - that's tech lead.
I'm strong on co-ordinating with Business, QA and Deployment teams - that's PM.
Yes, managing skills. How would you motivate your developer, attendance, deal with conflicts, etc.
With that in mind, I learned a lot from an American manager with PMP background only.
