Which XXX would replace the missing statement in the given algorithm for traversing a circular linked list? CircularListTraverse(head) { if (head is not null) { current = head do { visit current current = current⇢next } while (XXX) } } Group of answer choices current == head current == tail current != head current != tail

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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Which XXX would replace the missing statement in the given algorithm for traversing a circular linked list?

CircularListTraverse(head) {
if (head is not null) {
current = head
do {
visit current
current = current⇢next
} while (XXX)
}
}
Group of answer choices
current == head
current == tail
current != head
current != tail
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