Practice · Praxis

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Multiple choice Moderate big-odata-structures ~60s

What is the time complexity of looking up a key in a JavaScript Map?

A O(1) average B O(n log n) C O(log n) D O(n)

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: 48% — the selector aims at 78%.

difficulty fit 0.036

skill need 0.75

review boost 0

calibration bonus 0.12

recency penalty 0

repetition penalty 0

frustration 0