Technical screen Q: Given an array of objects with an "event type" and a time stamp 1. Return an object that represents the number of times each event occurred 2. Given an additional "window size", bucket the counts of each event by which "window" they occurred in. On-site presentation: Many questions about the project I presented about. System design Q: Design a url shortener Coding Q: Given a string with mistakes that make it less human readable, make the string human readable.