What does erase(iterator pos) method do in the LList class?

• A. Inserts a new element at the iterator's position.
• B. Removes the element at the iterator's position.
• C. Moves the iterator to the next position without modification.
• D. Returns the value at the iterator.

Answer: (B)

The erase operation in a linked list removes the node that the given iterator points to. It unlinks that node from the sequence by adjusting the neighboring pointers (and the list’s head or tail if needed), decreases the list size, and frees the node’s memory if the language requires manual deallocation. After erasing, many implementations provide an iterator to the element that comes after the erased one so you can continue iterating smoothly. This behavior matches the idea of removing the element at the iterator’s position, rather than inserting, just moving the iterator, or simply reading a value.