Just had my phone screen. These are the questions asked

1. TicTacToe (Modify move to get the result).https://leetcode.com/problems/design-tic-tac-toe/description/?envType=company&envId=facebook&favoriteSlug=facebook-thirty-days
2. Minimum remove to get valid Parantheses.

I could not the answer the first question , I failed miserably Lol.