There was an initial HR call describing the whole interview process.

First Round: Coding challenge with two questions to be solved in one hour. The level of the questions was a bit tough.

Second Round: Phone interview with an engineer. She asked me two coding questions and some background information related to my projects.

1. Optimal minimum cost problem

2. Given an array of n+1 integers in the range of 1..n, return a single duplicate element present in the array.