They reached out to me and said that due to my experience, they would forego the initial phone interview. They gave me so much grace because I had to reschedule my interview many times while I was also finishing my thesis. All the employees were helpful, but you have to get the hang of saying your thoughts out loud so they can ensure your thoughts are in the right direction. I lacked programming practice, so I felt like I got through the questions only 60-75%. I believe a few more months of programming practice will help catch me up.

How would you evaluate a mathematical expression that uses postfix notation?