If you call clear() on an empty list, what happens?

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Multiple Choice

If you call clear() on an empty list, what happens?

Explanation:
Clear is meant to reset a data structure to an empty state by discarding elements and resetting internal counters/pointers. If you call it on an empty list, there’s nothing to remove, so the operation simply confirms the list is empty and ensures the internal representation reflects that: size becomes 0 and the head (and tail) pointers indicate emptiness. This is why no error is raised and no dummy node is introduced—the action is idempotent: the list remains empty after the call.

Clear is meant to reset a data structure to an empty state by discarding elements and resetting internal counters/pointers. If you call it on an empty list, there’s nothing to remove, so the operation simply confirms the list is empty and ensures the internal representation reflects that: size becomes 0 and the head (and tail) pointers indicate emptiness. This is why no error is raised and no dummy node is introduced—the action is idempotent: the list remains empty after the call.

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