Experience: 2.5 years in development
Passed technical Online Screening: 2 Questions. Don't remember the questions: 1. PriorityQueue and 2. Traversal of 2D Matrix
4 Rounds of On-site Interviews:

1. A simple question to give smallest positive number at any given time, provided PriorityQueue( minHeap) Solution, was asked edge cases like provide least positive value even if there are no elements in the queue.. something like that.
2. OO Design: Design classes/ER Diagrams for a Warehouse/Inventory
3. ZigZag level order traversal- straight out of LC
4. https://leetcode.com/problems/cheapest-flights-within-k-stops/ was asked this.

All the rounds were accompanied by Leadership principles questions. Prepared a lot of stories for each of the principle.

Result: Reject

Takeaway: Didnt prepare the last question, but was able to provide BFS solution but at the end interview Interviewer mentioned they were expecting DFS solution( optimized).

Preparation: 300 problems in LeetCode, Cracking the Coding Interview( 2 times), Elements of programming book( 2 times), Dan Croitor videos, Grokking the Object Oriented Design and Grokking the System design interview.