This was for an internal transfer. I applied online and then met with the hiring manager and had a general discussion about my background and skills. Then had a second interview with the team lead. They informally offered me the job but then two weeks later I was told there was a hiring freeze.

Interview was fairly laid back. Talked with 2 managers. A few questions on past experience, and an aptitude test (mathematics and pattern recognition). Caveat, This was from my interview ~18 years ago.