A stack can be realized over a linked list by constraining the list so that every insertion and deletion occurs at the same end, making the list's head node serve as the top of stack. Because insertion and deletion at the head of a singly linked list are O(1) while the same operations at the tail require a full O(n) traversal, only the head end satisfies the stack ADT's constant-time push and pop requirement. This belongs to data structures within computer science, showing how an abstract data type's interface is enforced on top of a concrete dynamic (non-contiguous, pointer-linked) storage structure.
A stack can be realized over a linked list by constraining the list so that every insertion and deletion occurs at the same end, making the list's head node serve as the top of stack. Because inserti…