If the current state of the stack is [ x, y, z ] where x is the bottom of the stack and z is the top of the stack, what is the state of the stack and the value returned after a pop operation?
A) the state is [ x, y ]; z is returned
B) the state is [ x, y, z ]; z is returned
C) the state is [ y, z ]; x is returned
D) the state is [ x, y, z ]; x is returned

Question

Quizplus · Accepted Answer

A pop operation removes the top element of the stack, which in this case is z. Therefore, the state of the stack becomes [x, y], and the value returned is z.

If the Current State of the Stack Is [ X