Verizon Network Engineering/Systems Performance RF Design Network Engineering Co op interview questions

I applied online after a recruiter contacted me around December. The process took total of 4 months with 3 interviews. They first made me do a short video interview in January where I record myself about usual behavioral questions. After a month later, they emailed me to come in for an onsite interview with the managers that I would be working with in WA corporate office (Bellevue). That onsite interview was terrible. I thought I failed and messed up really bad (stumbled words a lot, felt like I was judged harshly, didn't seem friendly). Then in early March, I was told to do another interview (this time by phone) with a HR person where they asked the same questions they asked in 1:1 interview. This interview felt like they gave me another chance or something since I did absolutely terrible on the last one. So I did better and gave better examples to questions that were asked and felt really confident. I guess being prepared to explain your experiences was crucial. They'll interrogate it really thoroughly.