Question

Given an empty stack menuitems, what will be the result of the following operations?

stackpush(menuitems, item pizza)
stackpush(menuitems, item chips)
stackpush(menuitems, item nachos)
stackpush(menuitems, item tea)
print(stackpop(menuitems))
a) Tea, Tea, Nachos, Chips, Pizza
b) Pizza, Chips, Nachos, Tea
c) Tea, Pizza
d) Pizza

Answer 1

The result of the operations on the empty stack menuitems would be 'tea'.

Step-by-step explanation:

Given an empty stack menuitems, after performing several stack push operations with items pizza, chips, nachos, and tea, the stack would be structured with the last item pushed (tea) on the top. When stackpop(menuitems) is called, it would return the last item added to the stack, which is tea. Therefore, executing stackpop once would result in 'tea' being popped from the stack. The rest of the items would remain on the stack in the order of nachos, chips, and pizza (from top to bottom).

The result of the given operations on the empty stack menuitems would be:

1. stackpush(menuitems, item pizza) - The stack menuitems will now contain 'pizza'.
2. stackpush(menuitems, item chips) - The stack menuitems will now contain 'pizza' and 'chips'.
3. stackpush(menuitems, item nachos) - The stack menuitems will now contain 'pizza', 'chips', and 'nachos'.
4. stackpush(menuitems, item tea) - The stack menuitems will now contain 'pizza', 'chips', 'nachos', and 'tea'.
5. print(stackpop(menuitems)) - The stackpop operation will remove and return the top item of the stack, which is 'tea'.

Therefore, the result of the operations would be 'tea'.