After a while, though, I began to lose interest. My last coding practice was almost 20 years ago when I taught myself HTML and CSS, and getting back into the mindset was hard.

Because they are so different from most developers' real-world experience, even the best coders need to practice for these "exams." CodeFights wants to help developers practice for these interviews.

A startup that turns practicing your programming skills into a game, CodeFights, has just raised $2.4 million in seed funding to further develop its real-time, social game where developers can ...