Can a set of nodes be considered a singly linked list?

Yes, a set of nodes connected in such a way that each node only links to the next can be considered a singly linked list. In a singly linked list, each element stores data and a reference to the next element, allowing traversal from the beginning to the end.

Example of a simple singly linked list in Java:

class Node {
    int data;
    Node next;

    Node(int data) {
        this.data = data;
        this.next = null;
    }
}

public class LinkedList {
    Node head;

    public void add(int data) {
        Node newNode = new Node(data);
        if (head == null) {
            head = newNode;
        } else {
            Node current = head;
            while (current.next != null) {
                current = current.next;
            }
            current.next = newNode;
        }
    }
}

Thus, if your nodes are linked in one direction, this is a singly linked list.