How should I practice Rotate a Matrix by 90 Degrees?

Start by reading the full statement, solve the visible examples, then compare the pattern against related Mygate phone screen problems in FastPrep.

Is Rotate a Matrix by 90 Degrees associated with Mygate?

FastPrep tags this as a Mygate phone screen coding practice problem when the problem catalog has that company and stage context.

Mygate● MediumFULLTIMEPHONE SCREEN

Given an n × n integer matrix, rotate it 90 degrees clockwise in place and return the modified matrix.

The original value at row r and column c moves to row c and column n - 1 - r. Rows and columns use zero-based indices.

Keep the matrix square and preserve every value. An approach using temporary storage is valid; aim to reduce auxiliary space to O(1).

rotateMatrix(matrix: int[][]) → int[][]

matrix = [[1,2],[3,4]]return = [[3,1],[4,2]]

The original bottom-left value 3 moves to the top-left, and the original top-right value 2 moves to the bottom-right.

matrix = [[2,5,8],[1,4,7],[0,3,6]]return = [[0,1,2],[3,4,5],[6,7,8]]

Each original column becomes a row, read from bottom to top.