Signed NDA. But the questions were simple if you have studied properly. Interview question topics
1) Linked list - very simple question
2) Dial pad string generation / autocomplete related
3) System design - be prepared to design database etc from scratch ... basically prepare by thinking deeply in designing any system/components. Which means you need to specify which data structures to use, what will be work flow, how the concurrency and scale will be handled.
4) Leadership - study Amazon principles. Many questions on mentoring juniors.
5) Behavioral