In the section 8.3 queue implementation, what statement about destructor(linked list) is correct? The destructor requires that front_ptr is NULL for an empty queue. Otherwise the call to list_head_insert does not work. The destructor does not requires that front_ptr is NULL for an empty queue. The destructor requires that front_ptr is NULL for an empty queue. Otherwise the call to empty does not work. The destructor requires that front_ptr is NULL for an empty queue. Otherwise the call to list_clear does not work. The destructor requires that front_ptr is NULL for an empty queue. Otherwise the rear_ptr = rear_ptr->link(); does not work.

In the section 8.3 queue implementation, what statement about destructor(linked list) is correct? The destructor requires that front_ptr is NULL for an empty queue. Otherwise the call to list_head_insert does not work. The destructor does not requires that front_ptr is NULL for an empty queue. The destructor requires that front_ptr is NULL for an empty queue. Otherwise the call to empty does not work. The destructor requires that front_ptr is NULL for an empty queue. Otherwise the call to list_clear does not work. The destructor requires that front_ptr is NULL for an empty queue. Otherwise the rear_ptr = rear_ptr->link(); does not work.

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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8. In the linked list implementation of linear queue, there are two pointers front and back. Which of these pointers will change during an insertion operation on a NON-EMPTY queue? A. Only the back pointer. B. Only the front pointer. C. Both front and back pointer. D. None of the mentioned above.
The regular queue is a FIFO structure, meaning that you can only enqueue at the rear and dequeue at the front. Suppose that the dequeue operation can also be performed at the rear (so you can remove and return the last element on the queue), which of the following describes the correct and efficient way of using a linked list to implement this queue? OUsing a singly linked list with a reference to the head only, the dequeue method traverses it, stops at the last node and removes it. O Using a singly linked list with a reference to the head only, the dequeue method traverses it, stops at the second to last node and removes the last node. O Using a singly linked list with references that point to the first and the last nodes respectively, the dequeue method removes the last node via the corresponding reference. OUsing a doubly linked list with references that point to the first and the last nodes respectively, the dequeue method can remove the last node via the corresponding reference. O…
Consider the implementation of the Ordered Linked list class, implement the following functions as part of the class definition: ▪ index(item) returns the position of item in the list. It needs the item and returns the index. Assume the item is in the list.   ▪ pop() removes and returns the last item in the list. It needs nothing and returns an item. Assume the list has at least one item.   ▪ pop_pos(pos) removes and returns the item at position pos. It needs the position and returns the item. Assume the item is in the list.   ▪ a function that counts the number of times an item occurs in the linked list ▪ a function that would delete the replicate items in the linked list (i.e. leave one occurrence only of each item in the linked list) Your main function should do the following: ▪ Generate 15 random integer numbers in the range from 1 to 5.▪ Insert each number (Item in a node) in the appropriate position in a linked list, so you will have a sorted linked list in ascending order.▪…
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Suppose you are tasked with implementing a reverse queue in which elements are enqueued at the front and dequeued at the rear The umplementation is dynamic, and your queue class has Node pointers called front and rear, which point to the front and rear nodes in the queue respectively. The Node struct is given below: struct Node char element; Node * next ; }; Implement the dequeue function of the reverse queue which should return the dequeued value. The function prototype is T dequeue () For the toolbar (PCLor ALT+FN+F10 (Mac).
For instance: Computer programs generate and modify linked lists: The software normally tracks two nodes: How to utilize the null reference in the linked list's node in two frequent situations.
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The specifications for the Sorted List ADT state that the item to bedeleted is in the list.1. Rewrite the specification for DeleteItem so that the listis unchanged if the item to be deleted is not in the list.2. Implement DeleteItem as specified in (a) using anarray-based implementation.3. Implement DeleteItem as specified in (a) using alinked implementation.4. Rewrite the specification for DeleteItem so that allcopies of the item to be deleted are removed if they exist.5. Implement DeleteItem as specified in (d) using anarray-based implementation.6. Implement DeleteItem as specified in (d) using alinked implementation.
QUESTION 9 Write a complete Java program to implement a QUEUE in a bank using LinkedList class as follows: • Provide the menu as shown below; use an infinite loop; stop when user opts 4. 1. Add a customer 2. Remove a customer 3. Show the queue 4. Exit • Add a customer should add an int number at the end of queue using the method addLast(). • Remove a customer should delete the int from front using the method removeFirst(). Show the queue should display the numbers in queue using the method System.out.printIn(). For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac).
Think about the following example: A computer program builds and modifies a linked list like follows:Normally, the program would keep tabs on two unique nodes, which are as follows: An explanation of how to use the null reference in the linked list's node in two common circumstances
Think about the following example: A computer program builds and modifies a linked list like follows: Normally, the program would keep tabs on two unique nodes, which are as follows: An explanation of how to use the null reference in the linked list's node in two common circumstances
Write a Java program which stores three values by using singly linked list.- Node class1. stuID, stuName, stuScore, //data fields2. constructor3. update and accessor methods- Singly linked list class which must has following methods:1. head, tail, size// data fields2. constructor3. update and accessor methodsa. getSize() //Returns the number of elements in the list.b. isEmpty( ) //Returns true if the list is empty, and false otherwise.c. getFirstStuID( ), getStuName( ), getFirstStuScore( )d. addFirst(stuID, stuName, stuScore)e. addLast(stuID, stuName, stuScore)f. removeFirst ( ) //Removes and returns the first element of the list.g. displayList( ) //Displays all elements of the list by traversing the linked list.- Test class – initialize a singly linked list instance. Test all methods of singly linked list class