Another addition to the killer interview questions collection: How many birthday posts appear on Facebook each day?.
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That question is one used by Facebook when interviewing data scientists (even when you're as big as Facebook, a good data scientist is hard to come by). One important element that might not be immediately obvious in the question itself: it's important to define your terms.
Facebook has upwards of 1.3 billion users, which gives you a basic number to divide by 365. But what counts as a post? Facebook reminders of upcoming birthdays? Individual "happy birthday" posts on a wall? Replies to those posts? And should you be factoring in that birth patterns aren't necessarily distrubuted evenly?
How would you answer the question?
13 Tough Interview Questions Facebook Asks Job Candidates [Business Insider]