The first stage was a 30-minute Skype interview, covering general questions about myself, my software experience, and a short algorithmic question (no actual coding involved).

Next, I had an hour-and-a-half interview with a senior developer from the group I was interviewing with. In this stage, we thoroughly reviewed a project I had recently finished and tackled one algorithmic/data structure problem.

The last stage was an hour-and-a-half interview with the team leader of the team I was interviewing for. I was asked to solve a few algorithmic/data structure problems by coding on paper.

You have an array with 3 types of balls in it. Write code that will sort the array such that first there will be all the balls of one color, after all the balls of the second color, and lastly all the rest.