Phone Interview:
1.Flatten a Multilevel Doubly Linked List ( Provided solution using stack )
2.Flatten a Multilevel Doubly Linked List (Follow up: Recursive )
After this i got a call back in couple of days to schedule an virtual onsite

Virtual Onsite 1:

1. Subsets
2. Binary Tree Level Order Traversal

Virtual Onsite 2:
1.Desgin an Underground System

2. Number of steps to reach a target number by using two operations ie *2 and //3
   After finishing my first question, i had only 10min left, so i was unable to code the next question, so i was asked to explain my approach towards the problem ( I explained shortest path approach )

Each and every round in the process is started with a bit discussion about my background and techincal projects in depth.