C++ Standard Container Comparison

What are the main differences between std::vector and std::list in C++?

std::vector is a dynamic array that allows fast random access, while std::list is a doubly linked list that allows efficient insertions and deletions.

When should I use std::deque instead of std::vector?

Use std::deque when you need fast insertions and deletions at both ends, as it provides better performance for those operations compared to std::vector.

Can you explain the performance implications of using std::map versus std::unordered_map?

std::map is implemented as a balanced tree, providing O(log n) access time, while std::unordered_map uses a hash table, offering average O(1) access time but with potential collisions.

What about std::set and std::unordered_set?

std::set maintains order and allows for logarithmic time complexity for operations, while std::unordered_set offers faster average time complexity for lookups but does not maintain order.