Array Methods Knowledge Check

You've learned the most important array methods: forEach, map, filter, reduce, find, some, every, slice, splice, sort, reverse, flat, flatMap, includes, and entries.

This quiz checks whether you can choose the right method for a task and predict what each method returns.

You need to score 70% or higher to complete this lesson. You can retake the quiz as many times as you like - your best score counts.