Validate Game Board State | Dataford Interview Questions

Implement a function that validates the state of a game board, such as checking for a winner in a grid.

Implement check_winner(board), where board is a non-empty square list of lists containing only "X", "O", or ".". Return "X" or "O" if that symbol fills an entire row, column, or main diagonal. Return None if neither symbol has a winning line.

The board contains at most one winning symbol.

Constraints

1 <= len(board) <= 100
board is square
Each cell is one of "X", "O", or "."
The board contains at most one winning symbol

Function Signature

def check_winner(board):

Your question is Validate Game Board State. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.

Problem

Implement a function that validates the state of a game board, such as checking for a winner in a grid.

The board contains at most one winning symbol.

Constraints

1 <= len(board) <= 100
board is square
Each cell is one of "X", "O", or "."
The board contains at most one winning symbol

Function Signature

def check_winner(board):

Your question is Validate Game Board State. Start with the requirements in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.