Applied Knowledge Check

You've learned how to inspect objects, control property descriptors, reason about accessor behavior, use symbols, build custom iterables, delegate with Reflect, and design proxies carefully.

This quiz checks whether you can choose the right metaprogramming tool, predict behavior from code examples, and avoid common mistakes.

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.