Abbott Principal Software Engineer interview questions

I applied online through their website. After 10 days, I had a phone interview with the hiring manager. I was asked questions related to the skill set required for the job primarily in C++. After a month, I had onsite interview with four of the employees. I was skeptical that they would fly me down as the interview schedule showed only one hour duration. HR confirmed it was just a convenient way to have me meet with multiple people in a shorter amount of time. Most of the interview was conducted by only one software engineer. A senior manager primarily acted as a time keeper. I had 5 mins to ask any questions.