Microsoft Interview experience for SDE-2 (5+ years)

I had attended a Microsoft hiring event for Hyderabad location and Azure team. My experience is as follows:

F2F First round :
1. https://www.geeksforgeeks.org/zigzag-tree-traversal/amp/
2. https://www.geeksforgeeks.org/find-maximum-path-sum-two-leaves-binary-tree/amp/

F2F Second round :
1. We have given a matrix with positive numbers and few -1 in it. we need to replace each -1 with nearest positive number in the matrix.
2. Modified celebrity problem.https://www.geeksforgeeks.org/the-celebrity-problem/amp/

F2F Third round:
Sudoku solver more optimized than backtracking algorithm.

F2F Fourth round:
we have given 5 million records (points with latitude and longitude and whether information at that point). We will get a query for any position with lat and longitude to get whether information.
We need to return the whether information of nearest point on the globe (already given information)