👉 Rewinds in computer programming refer to a feature of a data structure, specifically a linked list or singly-linked list. When a node in a linked list is updated, it moves to the previous node and then continues to update itself as needed, while keeping track of its position. In other words, when you perform an operation on a linked list like adding a new element or deleting an existing one, you must first check if the head pointer (the starting point) exists. If it does not exist