Q1: Imagine you are creating a caching mechanism for a web application. Would you choose a WeakMap or a Map for storing cached data and why?

In a caching mechanism, using a WeakMap is preferred over a Map. This is because a WeakMap allows the keys to be garbage collected if there are no other references to them, which is beneficial for caching scenarios where you want the cached data to be automatically cleared when the corresponding objects are no longer in use. A Map, on the other hand, would retain the keys even if they are not needed anymore, leading to potential memory leaks in a caching context.