It's as per industry standard. Not very difficult, not very simple. Prepare well, and you can crack the interview. study about the company, its products and Markets. Good experience through the interview process.
I applied through college or university. The process took 1 day. I interviewed at Corning (Corning, NY) in Feb 2015
Interview
Started with a HR phone interview. A week later, was flown in for an interview onsite. Interviews with HR, hiring manager, lab manager, two senior engineers, each 30 minutes long. Lunch with hiring manager and finally a tour of the facility. Questions were straightforward, hiring manager did a good job explaining the position. Everyone was friendly.
Interview questions [1]
Question 1
Best and worst presentation experiences
Corning is a small town, why do you want to move here?