Design an efficient Tic-Tac-Toe engine

Q: Design an efficient Tic-Tac-Toe engine

This is a Coding & Algorithms interview question from Databricks for Software Engineer roles. View the full question and solution on PracHub.

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Question

Design a Tic-Tac-Toe engine on an n x n board. Implement move(row, col, player) -> result where result indicates no winner, player1 wins, player2 wins, or invalid move. Achieve O(

time per move and O(n) space by maintaining minimal state. Extend the API to support reset() and an optional undo(). Write comprehensive tests for edge cases (repeated moves, out-of-bounds, early wins, and filled board with no winner).

Design an efficient Tic-Tac-Toe engine

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