I applied online. The process took 2 months. I interviewed at Asian Development Research Institute (Patna, Bihar) in Dec 2019
Interview
Nicely conducted. Though the process was quite lengthy. They take care of TA, food and lodging.
Quite a transparent process. The results are prompt , they do not take much time to display the results even.
Interview questions [1]
Question 1
All technical and background questions were asked.