What does the following function do?public Object some_func()throws emptyStackException{ if(isEmpty()) throw new emptyStackException("underflow"); return first.getEle();} popdelete the top-of-the-stack elementretrieve the top-of-the-stack elementpush operation
Question
What does the following function do?public Object some_func()throws emptyStackException{ if(isEmpty()) throw new emptyStackException("underflow"); return first.getEle();} popdelete the top-of-the-stack elementretrieve the top-of-the-stack elementpush operation
Solution
The function some_func() is checking if a stack is empty. If the stack is empty, it throws an emptyStackException with the message "underflow". If the stack is not empty, it retrieves the top-of-the-stack element without deleting it. This is typically known as a peek operation in stack data structures. It does not perform a pop (delete the top-of-the-stack element) or push operation (add an element to the top of the stack).
Similar Questions
What happens when you try to pop an element from an empty stack? The program crashes. The top element is returned and removed. An error message is displayed. Nothing happens.
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What happens if you call top() on an empty stack in C++?It returns 0It throws an exceptionIt returns a garbage valueIt returns the last element pushed onto the stack
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