Phone Screen :

1. General resume overview.
2. Coding Question - Given a string, find all the unrepeated characters in a string.
3. Observer Pattern, Basics of machine learning (mentioned in resume)

[Round 1]

1. https://leetcode.com/problems/minimum-cost-to-connect-sticks
2. https://leetcode.com/problems/subsets/

[Round 2]

1. https://leetcode.com/problems/target-sum/
2. https://leetcode.com/problems/recover-binary-search-tree/

[Round 3]

1. Given an array of n no.s, intially sorted as 1 to n, each no. can exchange itself with a no. to it's right. A no. can only be switched twice. Find the no. of flips occured in the array to reach it's current state.

[Bartender]

1. Biggest technical challenge you faced.
2. Time when you went out of your assigned responsibility to maintain high standard delivery.
3. Time when you disagreed with your peers.
4. Roles and responsibility in current team.
5. Working accross peer times of different time zones.

[Hiring Manager]

Questions were similar to ones asked in bartender.