Assume that the following method is within the KWLinkedList class, what does this method do? public boolean undefined(E item) { if(head == null) return false: Node p = head.next; Node newNode= new Node(item, p): newNode.prev = head; head.next = newNode; p.prev = newNode: size++; return true; (A Inserts a new node with its data as item, at the end of the list. B Inserts a new node with its data as item at the front of the list. Inserts a new node with its data as item after the first node of the list. D Deletes the node with its data as item.

Assume that the following method is within the KWLinkedList class, what does this method do? public boolean undefined(E item) { if(head == null) return false: Node p = head.next; Node newNode= new Node(item, p): newNode.prev = head; head.next = newNode; p.prev = newNode: size++; return true; (A Inserts a new node with its data as item, at the end of the list. B Inserts a new node with its data as item at the front of the list. Inserts a new node with its data as item after the first node of the list. D Deletes the node with its data as item.

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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Assume the following method is inside the class SingleLinkedList. What does it do? public void test3Question(E item) { if (head == null) return; Node<E> temp = head; int index = indexOf(item); if(index == -1) return; Node<E> node = getNode(index); while (temp.next != node) temp = temp.next; temp.next = node.next; } Remove the node having item as data, if item exists; otherwise do anything. Remove the node after the node having item as data, if item exists; otherwise do anything. Insert a new node having item as data after the node being referenced by the getNode(index). Remove the node before the node having item as data, if item exists; otherwise do anything.
Question 7 Assume that the following method is within the KWLinkedList class, what does this method do? public boolean undefined(E item) { if(head == null) return false; Node p = head.next; Node newNode= new Node(item, p); newNode.prev = head; head.next = newNode; p.prev = newNode; size++; return true; A Inserts a new node with its data as item at the front of the list. B Inserts a new node with its data as item after the first node of the list. Inserts a new node with its data as item, at the end of the list. Deletes the node with its data as item.
class DoublyLinkedList: def __init__(self): self.head = None def is_empty(self): if self.head == None: return True else: return False def enqueue_front(self, data): new_node = Node(data) new_node.next = self.head if self.head is not None: self.head.prev = new_node self.head = new_node def enqueue_rear(self, data): new_node = Node(data) new_node.next = None if self.head is None: new_node.prev = None self.head = new_node return last = self.head while(last.next is not None): last = last.next last.next = new_node new_node.prev = last return def peek(self): return self.head.data def dequeue_front(self): if self.head is None: return temp = self.head self.head = self.head.next self.head.prev = None return temp.data…
package chapter02;  public class LinkedList {  protected LLNode list;   public LinkedList()  {  list = null;  }   public void addFirst(T info)  {  LLNode node = new LLNode(info);  node.setLink(list);  list = node;  }   public void addLast(T info)  {  LLNode curr = list;   LLNode newNode = new LLNode(info);  if(curr == null)  {  list = newNode;  }  else  {  while(curr.getLink() != null)  {  curr = curr.getLink();  }  curr.setLink(newNode);  }  }   public void add(T afterThis, T info)  {  //TODO Complete this method as required in the homework instructions    }   public void removeFirst()  {  //TODO Complete this method as required in the homework instructions    }  public void removeLast()  {  //TODO Complete this method as required in the homework instructions    }   public int size()  {  //TODO Complete this method…
class Node { public: Node() : data(0), prev(nullptr), next(nullptr) {} Node(int theData, Node* prevLink, Node* nextLink) : data(theData), prev(prevLink), next(nextLink) {} int getData() const { return data; } Node* getPrev() const { return prev; } Node* getNext() const { return next; } void setData(int theData) { data = theData; } void setPrev(Node* prevLink) { prev = prevLink; } void setNext(Node* nextLink) { next = nextLink; } ~Node(){} private: int data; Node* prev; Node* next; }; class AnyList { // friend function overloads the insertion operation public: // copy constructor // overloaded assignment operator // other member functions not necessary for your implementation private: Node *first; Node *last; int count; }; please help write copy constructor #include "AnyList.h" #include <iostream> using namespace std; // Definition of copy constructor // Instructions omitted intentionally. // Your code
class LinkedList { Node head; Node tail; Node findNodeWithData(int data); void addDataAfterNode(int data, Node noderef); } class Node {private int data; private Node next;public void setNextNode(data); public Node getNextNode(); }2. What JUnit test cases will you create for the LinkedList class: a. void findNodeWithData(int data); b. addDataAfterNode();3. Write your JUnit test case for testing the two methods above
public class CustomLinkedList { public static int findMax(IntNode headObj) { /* Type your code here */ } public static void main(String[] args) { IntNode headObj; IntNode currObj; IntNode lastObj; int i; int max; // Create head node headObj = new IntNode(-1); lastObj = headObj; // Add nodes to the list for (i = 0; i < 20; ++i) { currObj = new IntNode(i); lastObj.insertAfter(currObj); lastObj = currObj; } max = findMax(headObj); System.out.println(max); }}
Question 3 1 Point Assume the following method is within the KWLinkedList class, what does the following method do? public boolean undefined( ) { Listiterator iter1 = iterator( ); Listlterator iter2 = iterator(size - 1); if (Iter1.hasNext() && iter2.hasPrevious()) iff iter1.next().equals (iter2.previous()) return true; else return false; If the first element of the list is same as the last element of the list, then the method will return true else it will return false. B If the first two elements of the list are equal, then the method will return true, else it will return false. If the last two elements of the list are equal, then the method will return true, else it will return false. If the list is same in the forward and reverse direction, then the method will return true, else it will return false.
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; } 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.
please complete this method, thanks/** * Adds an item into the set if it is not already inside. * @param item to be added inside the set. * @throws IllegalArgumentException if item is null. */public void add(T item) {}
//main.cpp #include "linkedListType.h"int main(){Node* head = NULL;orderedLinkedList oll = orderedLinkedList(head); oll.insert(40);oll.insert(100);oll.insert(50); oll.printList(); oll.insert(50);oll.printList(); return 0;} //linkedListType.h #include <stdio.h>#include <iostream>using namespace std; class Node{public:int data;Node* next;}; class orderedLinkedList {Node* head; public:orderedLinkedList(Node* h) {head = h;} void insert(int new_data){Node* head_ref = head; while (head_ref != NULL && (head_ref->next != NULL) && (head_ref->next)->data < new_data){cout << head_ref->data << "\n";head_ref = head_ref->next;} if (head_ref != NULL && (head_ref->next != NULL) && (head_ref->next)->data == new_data){cout << "ERROR: Item to be inserted is already in the list\n";return;} /* Insert new node */Node* new_node = new Node();new_node->data = new_data;if (head_ref != NULL) {new_node->next =…