Apple Software Developer interview questions

Call with HR led to her scheduling an initial call with the hiring manager. I specially drove back home from office for this call. No one called me. I called HR, left a voicemail but no response. I emailed HR and again, no response. If you are planning on missing an interview let the other party know. You literally waste other person's time and energy. Not informing the person even after the event time is even more unprofessional. Great disappointment from Apple! Highly disappointed with Apple.

This was a college placement process for entry level. An online coding test was taken first. Selected candidates were taken for the interviews in next rounds. There were 3 different rounds.