You are given the data set of all Google crawled URLs on the Internet -- that's a very large set. Write an algorithm to find the median URL length.

Given a Google Search Query, find the AdWords Categories best describing it

You are given a stream of conversation in a mysterious language from planet Mars. Approximate the set of word vocabulary in this language.

You have trillions of URLs stored uniquely, without order, across numerous machines, each with a score. Find the 1000 URLs with the highest scores.