It was a formality. They just want to know that you will be doing the assigned work properly! It was the easiest interview one could have and kinda formality only.
I applied online. The process took 2 weeks. I interviewed at Hamari Pahchan (New Delhi) in Nov 2019
Interview
It was overall 2 round interview.
Round 1: CV checklist
Round 2: one-on-one interview was held and it was not so difficult. Just prepare 1-2 group projects which you have done earlier and why wanna join a NGO