It seems like they don’t want to listen your experience, but finding a vocabulary mistake in your resume. Interview looked like interrogation. They don’t know how to talk with experienced people (8 years), rather than asking formulas and symbols.
I applied online. I interviewed at Advanced Sys-tek (New Delhi) in Apr 2021
Interview
Very rude people the interviewer continuously asking about current salary and was not happy to give me better offer, they were only interested in harassing people
Basic questions were asked in the interview wasted my time
Interview questions [1]
Question 1
What is your current salary why you need this much hike