Capital One Machine Learning Engineer Coding & Algorithms Interview Questions
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Capital One
Medium
Machine Learning EngineerSolve matrix rotation and 1-D illumination
Question LeetCode 48. Rotate Image – rotate an n×n matrix 90° clockwise (extra space allowed). Find the point(s) with the maximum number of illuminate...
Coding & Algorithms
3
0
Aug 4, 2025
Capital One
Medium
Machine Learning EngineerReturn all root-to-leaf tree paths
Given the root of a binary tree, return all root-to-leaf paths. - A leaf is a node with no children. - A path should be represented as a string with n...
Coding & Algorithms
0
0
Dec 15, 2025
Capital One
Medium
Machine Learning EngineerMaximize grid-path expression and count sawtooth subarrays
Problem 1: Maximize a valid expression along a grid path You are given an m x n grid grid. Each cell contains either: - an operator: '+' or '-', or - ...
Coding & Algorithms
0
0
Oct 13, 2025
Capital One
Medium
Machine Learning EngineerRotate matrix and find max lamp coverage
1) Square-matrix rotation with extra space: Given an n x n integer matrix, return a new matrix that is the 90-degree clockwise rotation of the input. ...
Coding & Algorithms
0
0
Sep 6, 2025