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The solution is a 4x4 grid of letters where each row and column match the corresponding regexes. So the 4 letters descending from the column marked (LN|K|D)* should match the regex…

OP has posted this link before, both here https://news.ycombinator.com/item?id=10990206 (with the title "Get an interview at LinkedIn by solving this puzzle") and on the Who's Hiri…

Let's stop and think. This is a good thing . The truth is, none of us know whether or not it's snake oil. Just because we don't have enough information to prove it isn't a farce (b…