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Which container guarantees elements are stored in sorted key order?

  1. A std::unordered_map
  2. B std::map
  3. C std::vector
  4. D std::unordered_set
Answer

std::map

std::map is typically a red-black tree, giving O(log n) operations and ordered iteration. unordered_map gives no ordering at all.

All C++ MCQs

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