DSA · Theory

Push and Pop Operation in Stack

Theory

275/810

Push and Pop Operation in Stack

Push and Pop Operation in Stack is a DSA topic. In plain words you use it for undo typing in a tiny editor. Don’t start with a slogan — start with that picture.

Smallest example: push / pop LIFO. Type it, run it, and say what you see. If you can do that from memory, you know Push and Pop Operation in Stack.

From the example next to this theory — Push and Pop Operation in Stack — stack is LIFO: push/pop from the same end.

Trap — pop on empty. Fix that before you talk about advanced DSA.

Viva — what is Push and Pop Operation in Stack? Then show push / pop LIFO. Then name the trap.

Diagram

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

Exam tip

What is Push and Pop Operation in Stack? Show this: push / pop LIFO. Trap: pop on empty.

Example

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

Push and Pop Operation in Stack — stack is LIFO: push/pop from the same end.

Short notes

DefPush and Pop Operation in Stack — undo typing in a tiny editor.
Rulepush / pop LIFO
Trappop on empty
Usea tiny editor

DSA · Theory

Push and Pop Operation in Stack

← All stacks

Theory

275/810

Push and Pop Operation in Stack

Push and Pop Operation in Stack is a DSA topic. In plain words you use it for undo typing in a tiny editor. Don’t start with a slogan — start with that picture.

Smallest example: push / pop LIFO. Type it, run it, and say what you see. If you can do that from memory, you know Push and Pop Operation in Stack.

From the example next to this theory — Push and Pop Operation in Stack — stack is LIFO: push/pop from the same end.

Trap — pop on empty. Fix that before you talk about advanced DSA.

Viva — what is Push and Pop Operation in Stack? Then show push / pop LIFO. Then name the trap.

Diagram

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

Exam tip

What is Push and Pop Operation in Stack? Show this: push / pop LIFO. Trap: pop on empty.

Example

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

Push and Pop Operation in Stack — stack is LIFO: push/pop from the same end.

Short notes

DefPush and Pop Operation in Stack — undo typing in a tiny editor.
Rulepush / pop LIFO
Trappop on empty
Usea tiny editor

Push and Pop Operation in Stack

Example

Short notes

Questions

Push and Pop Operation in Stack

Example

Short notes

Questions