C++ Intermediate Quiz 4

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Quiz 4
1. Which variable is shared by all class instances?
2. What does shared_ptr::use_count return?
3. What is the purpose of std::weak_ptr?
4. What is a class with overloaded operator()?
5. Which specifier indicates no exceptions?
6. How to create a constant expression variable?
7. What is the purpose of std::declval?
8. What is the substitution failure principle?
9. Which header provides atomic operations?
10. What is a way to unpack tuples?
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