Amazon was hosted for our internships at our campus. The process started with an online round which consisted of 24 easy aptitude based questions and 7 very trivial debugging questions, followed by 2 coding questions.

The questions were:

1. Find a target value in a matrix which was column wise and row wise sorted.
   (can be solved using modified binary search)

2. A warehouse has walls and open paths, we are given a m x n matrix, marked 0 for free way and 1 for wall. There was a cell marked 9, we had to return true if that spot could be reached starting at (0,0). Movement was allowed in only cardinal directions (up, down, left, right).
   (can be solved using BFS or DFS)