535 views

Choose the correct alternatives (more than one may be correct) and write the corresponding letters only:

The following sequence of operations is performed on a stack:

PUSH  (10), PUSH (20), POP, PUSH (10), PUSH (20), POP, POP, POP, PUSH (20), POP

The sequence of values popped out is

1. $20,10,20,10,20$
2. $20,20,10,10,20$
3. $10,20,20,10,20$
4. $20,20,10,20,10$
edited ago | 535 views

Lets try something different when you read the word pop then delete the last pushed element and print it ..now delete the push word which we have already executed ..now go on from left to right and do the same

So, Output will be $20, 20, 10, 10, 20$

edited ago by
Nothing to explain. It will be B.
+1 vote
Just simple push pop operation option B