Yingying has two pointers list_p1 and list_p2 with type node_t**, pointing to the head of two singly-linked lists separately. Both link lists have sufficient and valid elements. She makes the following two calls to delete: delete (list_p1, 3); delete (list_p2, 7); In the second call to delete, an error occurs inside free (). USING 40 WORDS OR FEWER, explain a possible reason why such error may have occurred.

Yingying has two pointers list_p1 and list_p2 with type node_t**, pointing to the head of two singly-linked lists separately. Both link lists have sufficient and valid elements. She makes the following two calls to delete: delete (list_p1, 3); delete (list_p2, 7); In the second call to delete, an error occurs inside free (). USING 40 WORDS OR FEWER, explain a possible reason why such error may have occurred.

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

See similar textbooks

Similar questions

Add a new public member function to the LinkedList class named reverse() which reverses the items in the list. You must take advantage of the doubly-linked list structure to do this efficiently as discussed in the videos/pdfs, i.e. swap each node’s prev/next pointers, and finally swap headPtr/tailPtr. Demonstrate your function works by creating a sample list of a few entries in main(), printing out the contents of the list, reversing the list, and then printing out the contents of the list again to show that the list has been reversed. Note: your function must actually reverse the items in the doubly-linked list, not just print them out in reverse order! Note: we won't use the copy constructor in this assignment, and as such you aren't required to update the copy constructor to work with a doubly-linked list. This is what I have so far but its not working! template<class ItemType>void LinkedList<ItemType>::reverse(){ Node<ItemType>*curPtr,*prev,*next;…
Write a functionLi stNode *removeFirst( ListNode *ptr)that is passed a linked list as parameter and returns the tai l of the list: That is, itremoves the first node and returns what is left. The function should deallocate thestorage of the removed node. The function returns null ptr if the list passed to itis empty.
Given pointers to the head nodes of linked lists that merge together at some point, find the node where the two lists merge. The merge point is where both lists point to the same node, i.e. they reference the same memory location. It is guaranteed that the two head nodes will be different, and neither will be NULL. If the lists share a common node, return that node's value. Note: After the merge point, both lists will share the same node pointers. Example In the diagram below, the two lists converge at Node x: [List #1] a--->b--->c \ x--->y--->z--->NULL / [List #2] p--->q Function Description Complete the findMergeNode function in the editor below. findMergeNode has the following parameters: SinglyLinkedListNode pointer head1: a reference to the head of the first list SinglyLinkedListNode pointer head2: a reference to the head of the second list Returns int: the value of the node where the lists merge Input Format Do not read any input from…
Implement a program using Doubly LinkedList. Your doubly linked list should store information of students (Reg_no., Name, CGPA, city, age). Your program should provide following functionalities:  Insert at Front  Insert at Rear  Insert in middle  Delete from front  Delete from rear  Delete from middle  Display all the data Data Structures in C++ Needed urgent i will thumb up for you
You may do this assignment using either Java or C++. Do *not use the JDK LinkedList class or any linked list library! A linked list consists of zero or more nodes, which each contain one item of data and a link (Java reference, C++ pointer or reference) to the next node, if there is one. Linked List code is usually generic, so that you can use it to create a list of Strings, Students, Doubles, etc. For this assignment, you will write a simplified version of linked list that only can be used to create and use a list of ints and that has only a few of the functions typical of linked lists. The data element can be just an int, and the data type of the link to the next node can be just Node. You will need a reference (Java) or either a reference or a pointer (C++) to the first node, as well as one to the last node. Write a method/function that takes an in, creates a node with that int as its data value, and adds the node to the end of the list. This function will need to update the…
Computer Science In c++ (There should be three different files, "main.cpp", "sourcefile.cpp" and "header.cpp" your solution must have those three different files): Write a function that checks if the nodes in a linked list is sorted in ascending order. The function should return true if the values are sorted, otherwise false. Take user input. Call the funciton in the main function to show it is working.
Implement the function below void swap(int pos1, int pos2) {} For LinkedList, to maintain integrity of data in the structure, you are not to swap directly the element, nor remove a node. Instead, you are to only change the nodes' next pointers. Inital code to be completed: class LinkedList : public List { node* head; node* tail; int index; node* create_node(int num) { node* n = (node*) malloc(sizeof(node)); n->element = num; n->next = NULL; return n; } public: LinkedList() { index = 0; head = NULL; tail = NULL; } int add(int num) { addTail(num); return index; } int get(int pos) { node* currnode = head; int count =0; while (currnode != NULL){ count++; if (count == pos){ return currnode -> element; }else{ currnode = currnode -> next; } }…
Write a Python code using the given function and conditions. Do not use Numpy. Use LinkedList Manipulation. Given function: def insert(self, newElement, index) Pre-condition: The list is not empty. Post-condition: This method inserts newElement at the given index of the list. If an element with the same key as newElement value already exists in the list, then it concludes the key already exists and does not insert the key. [You must also check the validity of the index].
Develop a procedure that will allow you to remove from a linked list all of the nodes that share a key?
TRUE or FALSE? Answer the following question and state the reason why: The delete operation only involves the removing of the node from the list without breaking the links created by the next node. You need an array to represent each node in a linked list. STL lists are also efficient at adding elements at their back because they have a built-in pointer to the last element in the list. A circular linked list has 2 node pointers. cout<<list.back()<<endl; = The back member function returns a reference to the last element in the list. In a Dynamic Stack, the pointer top stays at the head after a push operation. During a Pop operation in Static Stack, the elements are being moved one step up. In a dynamic implementation of stack, the pointer top has an initial value of null. In a dynamic stack, the node that was popped is deleted. In a dynamic stack, the pointer top stays at the head after push operation. STL function top returns a reference to element at the top of the…
Complete the examples in the docstring and then write the body of thefollowing function:def same_first_last(L):""" (list) -> boolPrecondition: len(L) >= 2Return True if and only if first item of the list is the same as thelast.>>> same_first_last([3, 4, 2, 8, 3])True>>> same_first_last(['apple', 'banana', 'pear'])>>> same_first_last([4.0, 4.5])"""
Implement the following function def maxValue(alist: list)->int. alist contains integers only. This function finds and returns the largest numbr in the list. for example, alList-(1,5, 2), calling maxValue(alist) should return 5. Because 5 is the largest number in the list.