Multiple Choice Quiz

1. What does "template instantiation" refer to?

2. What will the following code snippet output?
  int x = 5;
  auto my_lambda = [x]() {
    x += 1;
    std::cout << x << " ";
  };
  my_lambda();
  my_lambda();
  std::cout << x << std::endl;

3. What is the type of the captured variable in the following lambda?
  const double pi = 3.14;
  auto get_area = [pi](int r){
    return std::to_string(pi * r * r);
  };

4. What is an explicit specialization of a template?

5. Which of that following is a potential downside of excessive use of templates, even when fully adhering to the C++ standard?

6. Given the following function template:
  template <typename T>
  bool CompareToZero(T in) {
    return in == static_cast<T>(0);
  }
Which function call will NOT cause a compilation error?

7. Consider this code:
  template <typename T=int>
  T getValue() {
      return T();
  }
What will getValue() return if called without any arguments?

8. Consider the function template:
  template <typename T>
  void func(T arg) { /* ... */ }
If you call func(42), what will be the type of T?

9. In which of the following scenarios is the typename keyword mandatory to disambiguate a declaration?

10. Given the following function template:
  template <typename T>
  void Print(const T & item) {
    std::cout << item << std::endl;
  }
Which call to Print would cause a compile-time error?