I had three over-the-phone interviews for the same position. After receiving positive feedback, I was invited to the nearest Apple office in London for a harrowing 11-hour interview series, with 5-10 minute breaks every hour.

I was very thoroughly examined by a dozen employees at Apple, both technically and based on my competence. I answered all their questions positively and correctly.

They turned me down but refused to provide any feedback.

There were too many questions to remember, but they were really very thorough and tough.