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
Made by
Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths and Science at Teachoo.