I applied online. The process took 2 months. I interviewed at Harish-Chandra Research Institute (Allahabad)
Interview
Apply by following the instructions in the advertisement on the institute's website, and you will get a call for an interview if selected. Online mode. You might have to present your PhD work.
Interview questions [1]
Question 1
Expertise developed during PhD time, and how are those relevant to the post one has applied for?