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Que. Suppose you are given an implementation of a queue of integers. The operations that can be performed on the queue are:

i. isEmpty (Q) — returns true if the queue is empty, false otherwise.
ii. delete (Q) — deletes the element at the front of the queue and returns its value.
iii. insert (Q, i) — inserts the integer i at the rear of the queue.
Consider the following function:

void f (queue Q) {
int i ;
if (!isEmpty(Q)) {
i = delete(Q);
f(Q);
insert(Q, i);
}
}

What operation is performed by the above function f ?
a. Leaves the queue Q unchanged
b. Reverses the order of the elements in the queue Q
c. Deletes the element at the front of the queue Q and inserts it at the rear keeping the other elements in the same order
d. Empties the queue Q
Answer:Reverses the order of the elements in the queue Q
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