DSA · Theory

Implementation of Stack using Linked List

Theory

18/810

If you can teach Implementation of Stack using Linked List using a ticket queue node, you know it. If you only know the heading, you don’t.

Implementation of Stack using Linked List on the board: head → next → …. Then say what a ticket queue node looks like after.

Without Implementation of Stack using Linked List, a counter gets messy and a ticket queue node is hard to trust.

Priya ships Implementation of Stack using Linked List in a counter. That is the use case worth saying.

Implementation of Stack using Linked List miss: losing the next pointer on delete. Fix it before you talk about advanced DSA.

Implementation of Stack using Linked List is not a lonely heading. Priya ties it to a ticket queue node.

Viva for Implementation of Stack using Linked List: what it is → head → next → … → the mistake (losing the next pointer on delete).

Diagram

    | 3 |  ← top (pop)
    | 2 |
    | 1 |
    LIFO

Exam tip

Board: a ticket queue node. Dry-run Implementation of Stack using Linked List. Name the trap: losing the next pointer on delete.

stack = []
stack.append(10)   # push
stack.append(20)
print(stack.pop()) # 20
print(stack[-1])   # peek → 10

Implementation of Stack using Linked List — stack is LIFO: push/pop from the same end.

DefImplementation of Stack using Linked List — Priya uses it for a ticket queue node in a counter.
RuleImplementation of Stack using Linked List → head → next → ….
RememberImplementation of Stack using Linked List + a dry-run table (a counter).
UseImplementation of Stack using Linked List in a counter (a ticket queue node).
TrapImplementation of Stack using Linked List — losing the next pointer on delete.
ExImplementation of Stack using Linked List → a ticket queue node.