Strong fundamentals in data types, scope and closures boost interview performance. Understanding promises and event loop behavior improves handling of async questions. Regular coding practice builds ...

Now's your chance to show us what you've got. I'll keep my expectations low. The rules are simple (they have to be) — five points for a correct answer.

Join the more than 5,000 other Eastsiders who receive our daily newsletter. Delivered weekday mornings.