Apple Computer Vision Researcher interview questions

I was contacted by a recruiter via LinkedIn. The recruiter asked to have a phone conversation to generally find out whether the position would be a good fit. Very broad and high level discussion. After speaking with the recruiter I was told that arrangements would be made to speak with the hiring manager on the phone for a more technical interview. The phone interview with the hiring manager consisted of coding and technical question Q&A. The coding part was first. The manager also wanted to ask questions about data structures. The technical question part consisted of theoretical questions regarding machine learning and approaches towards solving computer vision problems. No questions were asked regarding specifics on my resume. The expectation was to write code in C++.