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← JavaScript Closures: The Complete Guide (with Cheat Sheet)Quiz

JavaScript Closures

Test what you picked up about closures — private state, memoization, the loop-variable bug, and where closures cost you.

questions8
pass mark70%
resultsat the end

No account needed. Answer all 8 questions, then see your score with every answer explained and a reference to the spec or MDN — pass and you can claim a certificate.