What does the following function do? (3,9) void mystery (queueType& q) { stackType s; while (!q.isEmptyQueue ()) { s.push (q. front ()); q.deleteQueue (); } while (!s.isEmptyStack()) { q. addQueue (2 * s.top()); s.pop(); } The method mystery reverses the elements of a queue of int objects and also doubles the values of the queue elements. The method mystery reverses the elements of a queue of int objects and also triples the values of the queue elements. The method mystery sorts the elements of a queue of int objects and also doubles the values of the queue elements. O None of the above

What does the following function do? (3,9) void mystery (queueType& q) { stackType s; while (!q.isEmptyQueue ()) { s.push (q. front ()); q.deleteQueue (); } while (!s.isEmptyStack()) { q. addQueue (2 * s.top()); s.pop(); } The method mystery reverses the elements of a queue of int objects and also doubles the values of the queue elements. The method mystery reverses the elements of a queue of int objects and also triples the values of the queue elements. The method mystery sorts the elements of a queue of int objects and also doubles the values of the queue elements. O None of the above

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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7. Given a Queue Q, write a non-generic method that finds the maximum element in the Queue. You may use only queue operations. No other data structure can be used other than queues. The Queue must remain intact after finding the maximum value. Assume the class that has the findMax method implements Comparable. The header of the findMax method: public Comparable findMax(Queue q)
b. Write out the order of elements that are contained in a queue after the following operations are performed. myQueue.enqueue(new Integer(16)); myQueue.enqueue(new Integer(12)); Integer num1 = myQueue.dequeue(); myQueue.enqueue(new Integer(6)); myQueue.enqueue(new Integer(8)); myQueue.enqueue(new Integer(30)); myQueue.enqueue(new Integer(24)); myQueue.enqueue(new Integer(18)); myQueue.dequeue(); myQueue.dequeue(); myQueue.dequeue(); myQueue.enqueue(new Integer(38); Show how step by step process of arriving at your answer.
Use the following node definition for this problem.struct NodeInt32{int32_t value; NodeInt32* next;} Write a function which searches a non-empty linked list for a target value. Its exact signature should be: NodeInt32* find(NodeInt32* head, int32_t target); The function should return the first node whose value equals target. If the target is not found in the list, then the function should return NULL.
in c++ Write a function that takes a queue with 20 integer values and deletes the elements thatare between 15 and 20. In other words, only the elements less than 15 or greater than 20remain in the queue. This means that you need to have an auxiliary queue to store theelements between 15 and 20 and restore them back to the original queue.
class Queue { private static int front, rear, capacity; private static int queue[]; Queue(int c) { front = rear = 0; capacity = c; queue = new int[capacity]; } static void queueEnqueue(int data) { if (capacity == rear) { System.out.printf("\nQueue is full\n"); return; } else { queue[rear] = data; rear++; } return; } static void queueDequeue() { if (front == rear) { System.out.printf("\nQueue is empty\n"); return; } else { for (int i = 0; i < rear - 1; i++) { queue[i] = queue[i + 1]; } if (rear < capacity) queue[rear] = 0; rear--; } return; } static void queueDisplay() { int i; if (front == rear) { System.out.printf("\nQueue is Empty\n"); return; } for (i = front; i < rear; i++) { System.out.printf(" %d <-- ", queue[i]); } return; } static void queueFront() { if (front == rear) { System.out.printf("\nQueue is Empty\n"); return; } System.out.printf("\nFront Element is: %d", queue[front]);…
Assume a linked list contains following integers: 5, 2, 4, 6, 8, 3, 15 and the pointer head is pointing to the first node of the list. What will be the value of variable a after the following statements are executed: Node<int> *curNode=head; int a=0; while(curNode!=NULL){ a+=curNode->getItem(); curNode=curNode->getNext(); if(curNode!=NULL) curNode=curNode->getNext(); } A.32 B.43 C.19 D.18
struct remove_from_front_of_dll { // Function takes no parameters, removes the book at the front of a doubly // linked list, and returns nothing. void operator()(const Book& unused) { //// TO-DO (13) |||| // Write the lines of code to remove the book at the front of "my_dll", // // Remember, attempting to remove an element from an empty data structure is // a logic error. Include code to avoid that. ///// END-TO-DO (13) //// } std::list& my_dll; };
C++ Code for a QueueThe program should features a Queue class with insert(), remove(), peek(),isFull(), isEmpty(), and size() member functions.The main() program creates a queue of five cells, inserts four items, removes threeitems, and inserts four more. The sixth insertion invokes the wraparound feature. All the items are then removed and displayed. The output looks like this:40 50 60 70 80
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In C++ I need to write a recursive function insertEnd that will call a recursive method insertEnd(const ItemType& newEntry, Node<ItemType>* node), to insert newEntry at the end of the linked list I completely stuck and can't figure out where the error is coming from. main #include <iostream> #include "LinkedList.cpp" int main() { Node<int>* first = new Node(1); Node<int>* second = new Node(2); Node<int>* third = new Node(3); first->next = second; second->next = third; cout<<first->data<<endl; cout<<first->next->data<<endl; cout<<first->next->next->data<<endl; LinkedList<int> list; //an empty linked list for(int i =0; i<10; i++){ list.inserEnd(i); list.display(); } return 0; } linkedlist.cpp #include "LinkedList.h" #include "iostream" using namespace std; template <class T> LinkedList<T>::LinkedList(){ head = nullptr; } template <class…
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