Question 1 - MCQ Questions - Chapter 3 - Stacks

Last updated at August 14, 2026 by

Consider the following operation performed on a  stack of size 5. 

Push(1); 

Pop(); 

Push(2); 

Push(3); 

Pop(); 

Push(4); 

Pop(); 

Pop(); 

Push(5); 

After the completion of all operation, the number  of elements present in stack are 

(A) 1   (B) 2    (C) 3     (D) 4

 

Slide2.JPG

Slide3.JPG

 

Remove Ads
Teachoo · Class 12 Explore Class 12

Transcript

Question 1 Consider the following operation performed on a stack of size 5. Push(1); Pop(); Push(2); Push(3); Pop(); Push(4); Pop(); Pop(); Push(5); After the completion of all operation, the number of elements present in stack are (A) 1 (B) 2 (C) 3 (D) 4 push(1) Element 1 is inserted into the empty stack pop( ) Element 1 is deleted from the stack and the stack becomes empty push(2) Element 2 is inserted into the empty stack push(3) Element 3 is inserted into the stack pop( ) Element 3 is deleted from the stack push(4) Element 4 is inserted into the stack pop( ) Element 4 is deleted from the stack pop( ) Element 2 is deleted from the stack and the stack becomes empty push(5) Element 5 is inserted into the stack and the final stack has 1 element

Davneet Singh's photo - Co-founder, Teachoo

Made by

Davneet Singh

Davneet Singh is an IIT Kanpur graduate and has been teaching for 16+ years. At Teachoo, he breaks down Maths, Science and Computer Science into simple steps so students understand concepts deeply and score with confidence.

Many students prefer Teachoo Black for a smooth, ad-free learning experience.