Ruby Advanced Quiz 3

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Quiz 3
1. Which method can be used to control method visibility at runtime?
2. How to create a singleton class instance explicitly?
3. Which method is used to define a constant dynamically?
4. What is the purpose of `Thread#join`?
5. Which method is used for metaprogramming when adding methods to a module?
6. What is a 'Proc' in Ruby?
7. Which method returns an array of all methods available to an object?
8. How to get the source location of a method?
9. Which method defines a hook when a module is included?
10. What is `RubyVM::InstructionSequence`?
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