ExxonMobil Process Engineer interview questions

I submitted my resume to Exxon at a Career Fair, and shortly afterward was called for an interview in an office in the same building. After this initial interview, which was largely informal, I was set up to do a second interview at the facility of work. I drove up there for a day long interview schedule with 3 or 4 different people, ranging from HR to the plant manager. After that, they were arranging yet a third interview down in Houston when I declined and joined a different company.