Round 1: coding
Shift array by K position to the right without using extra space

Round 2: coding
Generate permutation of all characters in a string
In each level collect all leaf node till tree is empty

Round 3: system design
Desing notification system of Google Doc

Round 4: coding
find the largest peak in mountain. mountain is described by array
Design Twitter

Round 5: managerial
Behavioural questions + system design

Round 6: Director
Puzzle
Multithreading concepts
one DS question