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      Director of Site Reliability Engineering Interview

      2 Apr 2014
      Anonymous interview candidate
      No offer
      Positive experience
      Difficult interview

      Application

      I applied online. The process took 1 week. I interviewed at Tumblr in Mar 2014

      Interview

      HR phone screen. Tech phone screen

      Interview questions [1]

      Question 1

      code in the language of your choice: A site has 4,320,000 users. The users are sequentially numbered -- each user has a user_id between 1 and 4320000. You want to slowly roll out a new feature to all users, at a consistent rate of X users per second. The roll-out should start at noon today, beginning with the newest user (id 4320000). The rollout should last two days, so user_id 1 gets the feature around noon two days from now. $Write a function to determine whether the feature is currently enabled for a given user_id: can_use_new_feature(int user_id) -> bool.
      2 Answers
      1