I was asked some variation of the following questions:

1. https://leetcode.com/problems/subsets/
2. https://leetcode.com/problems/convert-sorted-array-to-binary-search-tree/
   • Followup questions about pre/in/post order traversal methods
3. https://leetcode.com/problems/maximum-population-year/
   • Similar to intuition for https://leetcode.com/problems/meeting-rooms-ii/ solution #2