DSA · Theory

Implementation of Stack using Array

Theory

17/810

Implementation of Stack using Array

Implementation of Stack using Array 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 Implementation of Stack using Array.

From the example next to this theory — Implementation of Stack using Array — stack is LIFO: push/pop from the same end.

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

Viva — what is Implementation of Stack using Array? Then show push / pop LIFO. Then name the trap.

Diagram

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

Exam tip

What is Implementation of Stack using Array? 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

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

Short notes

DefImplementation of Stack using Array — undo typing in a tiny editor.
Rulepush / pop LIFO
Trappop on empty
Usea tiny editor

DSA · Theory

Implementation of Stack using Array

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Theory

17/810

Implementation of Stack using Array

Implementation of Stack using Array 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 Implementation of Stack using Array.

From the example next to this theory — Implementation of Stack using Array — stack is LIFO: push/pop from the same end.

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

Viva — what is Implementation of Stack using Array? Then show push / pop LIFO. Then name the trap.

Diagram

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

Exam tip

What is Implementation of Stack using Array? 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

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

Short notes

DefImplementation of Stack using Array — undo typing in a tiny editor.
Rulepush / pop LIFO
Trappop on empty
Usea tiny editor

Implementation of Stack using Array

Example

Short notes

Questions

Implementation of Stack using Array

Example

Short notes

Questions