1A; Project integration techniques, time management, risk management, technical expertise etc.
2A: As a project manager, I experienced many challenges mostly time and resources point of view. At the time of project initiation we proposed project completion time but difficult to achieve due to environmental condition and some times social conditions. I mange the situation by past experience and resource management.
3A: It purely depends on severity of conflict and between individual / team. Most of the times I used to avoid .