Final answer:
The statement is true as the tail node in a linked list allows for constant-time additions to the end of the list, enhancing performance by avoiding full list traversal.
Step-by-step explanation:
The statement that in a linked list, the tail node is introduced for performance purpose only is True. In a linked list, the head node gives us a starting point for the data structure, while the tail node serves a specific performance purpose. Particularly, it allows for constant-time additions to the end of the list. Without a tail reference, to add an element at the end, one would have to traverse the entire list to find the last node, which is an O(n) operation where n is the number of elements in the list. With a tail node, the operation is reduced to O(1), since the last element is directly accessible without any traversal. This performance optimization is significant when frequent additions are required at the end of the list.
The tail node is the last node in the list and is used to keep track of the end of the list, making it easier to add new nodes at the end. Without the tail node, adding new nodes to the end of the list would require traversing the entire list, resulting in a significant performance overhead.
So, the tail node is not introduced for performance purposes but rather as a necessary component of a linked list.