Ruby Advanced Quiz 5

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Quiz 5
1. Which method defines a hook when a constant is missing?
2. What does `Object#tap` return?
3. Which method defines a hook when a method is removed?
4. What is the difference between `private` and `protected`?
5. Which method returns an object's metaclass?
6. Which method is used to define a class-level variable?
7. What is `Object#extend` used for?
8. Which method defines a hook when a module is extended?
9. Which method allows you to execute code in the module's context?
10. What does the `->` (stabby lambda) represent?
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