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:
20
stack underflow
4
no output
error
5
Clear answer
Consider these functions: push() : push an element into the stack

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