Assume that the following method is within the KWLinkedList class, what does this method do? public boolean undefined(Node ptr) { if(ptr == null) return false; Node p = ptr; while (p.next != null) p= p.next; Node newNode= new Node(ptr.data); newNode.next = p; newNode.prev = p.prev; p.prev.next = newNode; p.prev = newNode; size++; return true; }
Assume that the following method is within the KWLinkedList class, what does this method do? public boolean undefined(Node ptr) { if(ptr == null) return false; Node p = ptr; while (p.next != null) p= p.next; Node newNode= new Node(ptr.data); newNode.next = p; newNode.prev = p.prev; p.prev.next = newNode; p.prev = newNode; size++; return true; }
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
Problem 1PE
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Question
![Assume that the following method is within the KWLinkedList class, what does this method do?
public boolean undefined(Node<E> ptr)
{
if(ptr == null) return false;
Node<E> p = ptr;
while (p.next != null)
p = p.next;
Node<E> newNode= new Node<E>(ptr.data);
newNode.next = p;
newNode.prev = p.prev;
p.prev.next = newNode;
p.prev = newNode;
size++;
return true;
}
a. Inserts a new node with its data as the data of the node referenced by ptr, before the last node.
O b. Inserts a new node with its data as the data of the node referenced by ptr, at the end of the list.
Oc. Inserts a new node with its data as the data of the node referenced by ptr, after the first node of the list.
O d. Deletes a node referenced by ptr, from the list.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fdeb17eef-57d7-43a1-af8c-1531444fc3c3%2Fac5ff304-36ba-41b7-bbce-6c30021cbe30%2Fbl4zbbi_processed.png&w=3840&q=75)
Transcribed Image Text:Assume that the following method is within the KWLinkedList class, what does this method do?
public boolean undefined(Node<E> ptr)
{
if(ptr == null) return false;
Node<E> p = ptr;
while (p.next != null)
p = p.next;
Node<E> newNode= new Node<E>(ptr.data);
newNode.next = p;
newNode.prev = p.prev;
p.prev.next = newNode;
p.prev = newNode;
size++;
return true;
}
a. Inserts a new node with its data as the data of the node referenced by ptr, before the last node.
O b. Inserts a new node with its data as the data of the node referenced by ptr, at the end of the list.
Oc. Inserts a new node with its data as the data of the node referenced by ptr, after the first node of the list.
O d. Deletes a node referenced by ptr, from the list.
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