I had two interview panels — one from HR and another from the mill engineering team. The HR questions were more basic and focused on getting to know you, while the mill engineer asked technical questions like the laws of thermodynamics, fluid mechanics, mechanics of machines, stress, strain, and Young’s modulus. Basically, all the fundamental things you learned from those subjects — make sure to remember them! I’m sharing this to help you guys since I had no clue before this. Good luck!