Question: Consider these functions: push ( ) : push an element into the stack pop ( ) : pop the top - of - the -

Consider these functions:
push() : push an element into the stack
pop() : pop the top-of-the-stack element
top() : returns the item stored in top-of-the-stack-node
What will be the output after performing these sequence of operations
push(20);push(4);top();pop();pop();push(5);top();
Your answer:
stack underflow
20
error
5
4
no output

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