Phone Interview:

1. Sorting problem sort int array by frequency, and for duplicate frequencies, sort by value from highest to lowest.
2. 2 sum and 2 sum variations.

Onsite 1:

1. Graph problem similar to 797. All Paths From Source to Target
2. Design a calculator

Onsite 2:

1. Flatten Multilevel Doubly Linked List
2. Design Underground System

HR:
Behavioral questions