Praxis — An adaptive tutor that shows its working Guest learner

JavaScript › Functions and closures

0/0 this session +0 XP
Multiple choice Moderate closuresvar-vs-letclassic ~80s

What does this log? for (var i = 0; i < 3; i++) { setTimeout(() => console.log(i), 0); }

Hints are free to take and they are counted. A correct answer after two hints moves your mastery less than one without — which is the honest way to score it.

Why this question? this skill is new to you; it stretches you slightly; and it needs calibrating — few people have tried it Predicted chance you get it: 43% — the selector aims at 78%.
difficulty fit 0.013
skill need 0.75
review boost 0
calibration bonus 0.12
recency penalty 0
repetition penalty 0
frustration 0