Long interview process. 4 rounds, including phone call screening, Skype programming screening, in-person technical interview, and in-person executive interview.

The interviews were technical, but they also focused on fitting into the culture. All the interviews were tough questions, but if you answer honestly, you should do fine.

Given a string, return a boolean whether or not the string is a palindrome.

Given an array of numbers, return the sum of all duplicated numbers. So an array [1, 2, 3, 2, 1], the function returns 6.