Question

Consider the following operations on an initially empty stack: 
Push 10 
Push 20 
Pop 
Push 30 
Pop 
Push 40 

What is the final content of the stack?

• A. 10, 40
• B. 40, 20
• C. 40, 10
• D. 30, 40

Hint:

A stack operates on a Last-In, First-Out (LIFO) principle. Carefully follow the sequence of push and pop operations to track the stack's content.

Answer 1

The Correct Option is A

Stack Operations Breakdown 
- Push 10: Stack = [10] 
- Push 20: Stack = [10, 20] 
- Pop: Removes 20, Stack = [10] 
- Push 30: Stack = [10, 30] 
- Pop: Removes 30, Stack = [10] 
- Push 40: Stack = [10, 40] 

Thus, the final content of the stack is [10, 40].