Solution in Java: Given an mxn two-dimensional character grid board and a string word word. Returns true if word exists in the grid; otherwise, returns false. Words must be in alphabetical order, by adjacent...

Answer: You can use the backtracking method to solve this problem, that is, iterate through each cell of the board and try to add it to the word. If the addition is successful, continue to try to add its adjacent cells; if the addition fails, backtrack to Previous cell to try other possibilities. Returns true if the length of the final string is the same as the length of the word, false otherwise.