Consider a linked list whose nodes are objects of the class Node: class Node { public int data; public Node next; } prev references a node n1 in the list and curr references the node n2 that is right after n1 in the list. Which of the following statements is used to delete the node n2? Oprev.next = curr; Ocurr.next = prev; Oprev= curr.next; Oprev.next = curr.next;
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- Implement class “LinkedList” which has two private data members head: A pointer to the Node class length: length of the linked listImplement the following private method:1. Node* GetNode(int index) const;A private function which is only accessible to the class methods. . For example, index 0 corresponds to the head and index length-1 corresponds to end node of the linked list. The function returns NULL if the index is out of bound.Implement the following public methods:2. LinkedList();Constructor that sets head to NULL and length equal to zero.3. bool InsertAt(int data, int index);Insert a new node at the index. Return true if successful, otherwise,return false. The new node should be at the position “index” in the linked list after inserting it. You might have to use GetNode private function. these 3 partsImplement class “LinkedList” which has two private data members head: A pointer to the Node class length: length of the linked list // Node* GetNode(int index) const;A private function which is only accessible to the class methods. This function takes an array-like index and returns the address of the node at that index. For example, index 0 corresponds to the head and index length-1 corresponds to end node of the linked list. The function returns NULL if the index is out of bound.// Implement the following public method: 1. bool RemoveHead();// Use RemoveAt FunctionRemove first node. Return true if successful, otherwise, false.2. bool RemoveEnd();// Use RemoveAt FunctionRemove last node. Return true if successful, otherwise, false.3 . void DisplayList() const;Display data of the whole linked list this in c++.Consider the LinkedList in the given figure. Assume that the nodes are objects of the ListNode class given below. Assume further that list, ptr1 and ptr2 are reference variables of the ListNode type. Write a Java statement (one statement only) to make ptr2 point to the node containing the info 44. * list 18 32 23 16 43 25 44 . null ptri ptr2 public class ListNode<T> { private T info; private ListNode<T> link; public ListNode(T info, ListNode<T> link) { this. info = info; this.link = link; public void setInfo(T info) { this. info = info; public void settink(ListNode<T> link) { this.link = link; public T getInfo() { return info; public ListNode<T> getlink() { return link;
- Using a doubly linked list class and node class, implement the following methods: Node* lastNode(void); void pushBack(string argData); void popBack(void); void pushFront(string argData); void print(void); void printReverse(void); void insertAfter(Node* argPtr); void deallocateAll(void); Node* searchFor(string argData); int size(void); Hard code a linked list (no UI) in the main to demonstrate your functions. Print forward and backward to show that the links are well-formed.Suppose x is a linked-list node and not the last node on the list. What is the effect of the following code fragment?x.next = x.next.next;Implement a class “LinkedList” which has two private data members head: A pointer to the Node class length: length of the linked listImplement the following private method: 1. bool InsertHead(int data); // Use InsertAt FunctionInsert at the start of the linked list. Return true2. bool InsertEnd(int data); // Use InsertAt FunctionInsert at the end of the linked list. Return true3. bool RemoveAt(int index);Remove and delete the node at position “index”. Return true if successful, otherwise, false. this in c++
- Java Given main() in the Inventory class, define an insertAtFront() method in the InventoryNode class that inserts items at the front of a linked list (after the dummy head node).Given main.py and an IntNode class, complete the IntList class (a linked list of IntNodes) by writing the insert_in_descending_order() method to insert new IntNodes into the IntList in descending order. Ex. If the input is: 3 4 2 5 1 6 7 9 8 the output is: 9 8 7 6 5 4 3 2 1 main.py(can not edit) from IntNode import IntNodefrom IntList import IntList if __name__ == "__main__": int_list = IntList() input_line = input() input_strings = input_line.split(' ') for num_string in input_strings: # Convert from string to integer num = int(num_string) # Insert into linked list in descending order new_node = IntNode(num) int_list.insert_in_descending_order(new_node) int_list.print_int_list() IntNode.py(can not edit) class IntNode: def __init__(self, initial_data, next = None, prev = None): self.data = initial_data self.next = next self.prev = prev IntList.py(need to edit)in java, The following is a class definition of a linked list Node:class Node{int info;Node next;}Assume that Node's constructor receives no parameters. For each line of the code below, explain what memory is being allocated by JVM (Java Virtual Machine). int counter = 0; double dd; String str = “New Label”; Node myNode; myNode = new Node();
- You may find a doubly-linked list implementation below. Our first class is Node which we can make a new node with a given element. Its constructor also includes previous node reference prev and next node reference next. We have another class called DoublyLinkedList which has start_node attribute in its constructor as well as the methods such as: 1. insert_to_empty_list() 2. insert_to_end() 3. insert_at_index() Hints: Make a node object for the new element. Check if the index >= 0.If index is 0, make new node as head; else, make a temp node and iterate to the node previous to the index.If the previous node is not null, adjust the prev and next references. Print a message when the previous node is null. 4. delete_at_start() 5. delete_at_end() . 6. display() the task is to implement these 3 methods: insert_at_index(), delete_at_end(), display(). hint on how to start thee code # Initialize the Node class Node: def __init__(self, data): self.item = data…Given main.py and a Node class in Node.py, complete the LinkedList class (a linked list of nodes) in LinkedList.py by writing the insert_in_ascending_order() method that inserts a new Node into the LinkedList in ascending order. Ex: If the input is: 8 3 6 2 5 9 4 1 7 the output is: 1 2 3 4 5 6 7 8 9 Code givenCOVID-19 has an effect on the whole world. People are interested in knowing the current situation of COVID-19. You are required to write JAVA-program for storing information in a Single way Linked List. Following JAVA classes are provided. // Node class public class COVIDDetail { public String country; public int activecases; public COVIDDetail next; } // linked List class public class COVIDList { COVIDDetail start=null; } You are required to add the following methods to COVIDList class void add(COVIDDetail n) this method receives a node as an argument and adds it to the given list. Nodes are arranged in descending order with respect to number of cases. Note that you are not required to sort the list in fact while adding first find its appropriate position and then add a given node to that position. void updateCases(String country_name , int cases) this method receives two-argument country names and cases (can have positive or negative value). Update…