Noida Power interview questions

I was asked to design a lubricant that might be suitable for their open ended problem related to glitches coming up in their factory machines. I started with looking for common compounds and discussed pros and cons of each of them, and based on that, we came up with another formula predicting it's properties using gnn models.

1st round was the online test and 2nd round was the interview. the online test contains que of Aptitude and Technical que like output-based questions and some basics of C. There were approx 10 questions of Aptitude and 40 questions of Technical.