Round 1: DS/PS

1. https://leetcode.com/problems/validate-binary-search-tree/
2. https://leetcode.com/problems/find-the-celebrity/

Round 2: Machine Coding
https://leetcode.com/discuss/interview-question/295225/Design-bowling-alley

Round 3: HLD
Design trending topics on Twitter.

Round 4:
HM Round

1. Why are you leaving your current organisation?
2. Discussions regarding previous work
3. Strengths
4. Weaknesses
5. Long term plan