Riverbed Technology

1. If the element is not present, return the nearest element to it.

2. Given two lines, one with 10 points and the other with 12 points, how many triangles are possible?

3. Given an array of strings, identify the index of the most recent duplicate. For example, given the array ["google", "yahoo", "yahoo", "google"], both "google" and "yahoo" are repeated, but "google" is the most recent duplicate, so return index 3.