Question

You are given the implementation of a method - transfer(S,T) - as follows:

static <E> void transfer(Stack<E> S, Stack<E> T) {
while (!S.isEmpty()) {
T.push(S.pop());
}
}

What does this function do ?

A. Transfers all elements from stack S onto stack T , so that the element at the top of S is the first to be inserted onto T , and the element at the bottom of S ends up at the top of T

B. Transfers all elements from stack S onto stack T, so that the element that starts at the top of S is the last to be inserted onto T , and the element at the bottom of S ends up at the bottom of T

C. Is equivalent to T=S

D. The code will throw error

Answer 1

A. Transfers all elements from stack S onto stack T , so that the element at the top of S is the first to be inserted onto T , and the element at the bottom of S ends up at the top of T