Apple Intern interview questions

Three technical phone interviews with three different people from the team that was interested in me. They all asked different questions that were pertaining to materials, stress strain graphs, and more

I interviewed for a graphic design intern in 2018. The whole process took about two-three weeks. I was first reached out via by HR to schedule two interviews with two groups of people who were either creative directors for senior designer. The process of interview was smooth, I mostly went through my portfolio, and they kindly gave me feedback on how I performed in presenting my projects. I was informed by the HR on a phone call that I was accepted for the internship.