Provide the structure of a dynamic array- based queue after each iteration of the for loop when the following lines of code are executed. You must list the queue's contents, size, and capacity in the format provided below. You should assume the initial capacity is 2. If size== capacity before inserting a new element, you will need to resize by doubling the capacity and copying elements over to the new memory location. Note that this queue does NOT use a circular buffer implementation. values = Queue() for i in range(16): if i % 3 == 0: values.enqueue(i)

Provide the structure of a dynamic array- based queue after each iteration of the for loop when the following lines of code are executed. You must list the queue's contents, size, and capacity in the format provided below. You should assume the initial capacity is 2. If size== capacity before inserting a new element, you will need to resize by doubling the capacity and copying elements over to the new memory location. Note that this queue does NOT use a circular buffer implementation. values = Queue() for i in range(16): if i % 3 == 0: values.enqueue(i)

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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Consider the current elements and its indexes in the queue of size 15: {index[00]=102, index[01]=165, index[02]=115, index[03]=384, index[04]=248, index[05]=111}, draw a table (like shown below) the sequence of elements using the operations listed from number 1 to 26 using the queue approach (A) - in shifting the elements one position forward every time an element is deleted. The following are the description of other operations to be used that would result in a QUEUE that contains the elements. IsTopValue – returns the value at the TOP of the queue. IsRearValue – returns the value at the REAR of the queue. IsTopIndex – returns the index of the value at the TOP of the queue. IsRearIndex – returns the index of the value at the REAR of the queue. IsIndexOf – returns the index of the specific value. IsValueOf – returns the value of the specific index. Insert (Q, 12) Dequeue (Q) Dequeue (Q) Insert (Q, 65) Insert (Q, 100) Insert (Q, 43) Dequeue (Q) IsTopValue (Q) Insert (Q, 61) Dequeue…
4) Given that a queue is being represented by the following circular representation in an array (front is currently 4 and back is currently 7): array component: 0 1 2 4 5 6 7 8 | | | | 37 | 41 | 12 | 34 | | a) Show what this representation would like after the following sequence of operations are performed: deq(q, i); deq(q, j); enq(q, 81); enq(q, 72); enq(q, 38); deq(q, k); (indicate the current position of front and back for each operation) b) What is an advantage of this implementation of a queue? c) What is a disadvantage of this implementation of a queue?
Which of the following statements are true about implementing a queue using dynamically linked nodes? The size of the queue cannot be obtained with O(1) time complexity if the variable that keeps track of the number of items is not maintained. If only a head pointer is used, the dequeue operation will have a time complexity of O(n). If only a head pointer is used, the enqueue operation will have a time complexity of O(n).
Indicate the Big-O rate of growth of run-time for: a) Insertion into a queue that is implemented using and ordinary array with the front of the queue always maintained in component zero of the array. b) Deletion from a queue that is implemented using an ordinary component zero of the array. c) Deletion from a queue using a circular array implementation.
Two major issues of simple Queue data structure are 1) Memory wastage, and 2) limitation of using the same array indices again after the queue elements are deleted. How can you solve these problems? Briefly explain your proposed solutions.What changes you need to make in the following enqueue() function, so that the above-mentioned problems will not happen again.Perform this task on paper, take a clear picture of solution and paste it in answer section. void enqueue(int val) { if(isFull()) cout<<”Queue is Full”<<endl; else myArray[++rear] = val; }
Need help in Stack/Queue Which of the following statements are correct about the time complexity of the operations of Queue implementations? If not, why? (ex. if 1 is incorrect, write fixed version, like dynamic array is used for implementation) If a circular array is used for implementation, the dequeue operation has a time complexity of O(n). If an array is used for the implementation with the first element in the queue always stored in index 0 of the array, the time complexity of the dequeue operation is O(n). If an array is used for the implementation with the first element in the queue always stored in index 0 of the array, the worst-case time complexity of the enqueue operation is O(n).
We are given a Queue data structure that supports standard operations like enqueue()and dequeue(). We need to implement a Stack data structure using only instances ofQueue and queue operations allowed on the instances. Hint: A stack can be implemented using two queues but we dont allow to use build in function , make 3 files .h,.h.cpp like Queue.h , MyQueue.h ( in with all function performe ) and the last one main.cpp
While implementing a queue using Array what type of a problem occurs when inserting and deleting an item takes place at constant time? Q-. What is the proposed solution to the above problem and what changes are made in enqueue( ) and dequeue( ) operation when solving the issue in data structure using C++? Subject : C++ Department: Computer Science
A. Suppose that q1 is a class CircularQueue object that is using circular queue concept and the maximum size of the array implementing q1 is 10. The current index value of front is 5 while the current index value of rear is 9. i. What are the index values of front and rear after adding TWO (2) elements into q1? Draw the circular queue diagram to show the addition process. ii. After implementing the process in Question 2A (i), what are the index values of front and rear after removing FIVE (5) elements from q1? Draw the circular queue diagram to show the removing process. iii. What are the current number of elements after implementing the process in Question 2A (i) and Question 2A (ii)? =======================
Exercise 2 Given the following function to update a node in a standard linked list:public boolean update(Node head, int oldValue, int newValue){if (head == null)return false;while (head != null)if (head.data == oldValue){head.data = newValue;return true;}elsehead = head.next;return false;}There may be an error with the code. Answer the following:1) Design your own linked list of 4 nodes with different values2) If the code has an error, describe the issue and provide an example of calling theupdate function with values of your choice and show what the linked list looks likea. Also, show the code changes you would make to fix the error3) If the code does not have an error, provide an example of calling the update functionwith values of your choice and show what the linked list looks likeFor example, if your linked list was 1 -> 2 -> 3 -> 4, and you think there is an error withthis code, you could say something like “the problem with the code is xxx and after callingupdate(3, 5),…
(a) In implementing a Queue using an array, a problem might arise if the Queueis implemented in such a way that items in the Queue are inserted at thenext available location and removed from the next leading position, butsuch that, once deleted, the emptied space is unused. The problem thatarises is one where there is free space still in the array, but it is not usablebecause it is not at the end.Demonstrate this problem with a Queue that is stored in an array of size 5for the following instructions. Next, explain how you might resolve thisproblem.Queue q = new Queue(5); // assume the Queue constructor takes 5 asthe size of the arrayq.enqueue(3);q.enqueue(4);q.enqueue(1);q.dequeue( );q.dequeue( );q.enqueue(6);q.enqueue(5);q.dequeue( ); // at this point,// there are only 2 item2 in the queueq.enqueue(7); // this enqueue cannot occur, why??
A double linked list may be implemented in a workspace array by utilising only one index next. That is, we do not need to retain a distinct field back in the workspace array nodes to detect the backward linkages. The goal is to add a member workspace[current] into workspace[current] rather than the index of the next element on the list. The difference is the index of the next item less the index of the entry preceding current. We must additionally keep two pointers to subsequent nodes in the list, the current index and the prior index of the node right before current in the linked list.To find the next entry of the list, we calculate workspace[current].difference + previous; Similarly, to find the entry preceding previous, we calculate current − workspace[previous].difference;