Note : addqueue works like Enqueue and deleteQueue works like Dequeue Consider the following statements: (8, 9) queueType queue; int num; Show what is output by the following segment of code num = 7; queue.addQueue (6); queue.addQueue (num); queue.front (); queue.deleteQueue (); queue.addQueue (num + 5); queue.addQueue (14); 2) ; num = queue.addQueue (num queue.addQueue (25); queue.deleteQueue () ; cout « "Queue elements: "; while (!queue.isEmptyQueue ()) { cout <« queue.front () << " "; queue.deleteQueue(); } cout <« endl; Queue elements: 14 14 4 25 Queue elements: 11 14 44 Queue elements: 11 14 4 25 Queue elements: 11 14 25 25

Note : addqueue works like Enqueue and deleteQueue works like Dequeue Consider the following statements: (8, 9) queueType queue; int num; Show what is output by the following segment of code num = 7; queue.addQueue (6); queue.addQueue (num); queue.front (); queue.deleteQueue (); queue.addQueue (num + 5); queue.addQueue (14); 2) ; num = queue.addQueue (num queue.addQueue (25); queue.deleteQueue () ; cout « "Queue elements: "; while (!queue.isEmptyQueue ()) { cout <« queue.front () << " "; queue.deleteQueue(); } cout <« endl; Queue elements: 14 14 4 25 Queue elements: 11 14 44 Queue elements: 11 14 4 25 Queue elements: 11 14 25 25

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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Assume a linked list contains following integers: 7, 2, 9, 5, 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; Node<int> *aNode; int s; while(curNode!=NULL){ { aNode=curNode; curNode=curNode->getNext(); } s=aNode->getItem(); A. 15 B. 3 C. 7 D. 2
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.
26. HomeExpert Q&AMy answers Student question Time to preview question: 00:09:49 int QUEUE_IS_EMPTY; int QUEUE_IS_FULL; void generator(){ Object thing = generate(); pthread_mutex_lock(&qlock); if (QUEUE_IS_FULL){ pthread_cond_wait(&queue_not_full); } enqueue(thing); pthread_cond_signal(&queue_not_full); pthread_mutex_unlock(&qlock); } void consumer(){ pthread_mutex_lock(&qlock); Object thing = dequeue(); consume(thing); while (QUEUE_IS_EMPTY){ pthread_cond_wait(&queue_not_empty); } pthread_cond_signal(&queue_not_full); pthread_mutex_unlock(&qlock); } This code generates objects in generator(), and consumes them in consumer(). Objects are placed into a queue to be consumed, and this queue has a limited size. enqueue() adds an item to the queue, and dequeue() removes one. An item may not be enqueued if the queue is full, or dequeued if the queue is empty. You may assume that QUEUE_IS_EMPTY and QUEUE_IS_FULL always correctly…
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]);…
Given the following code, assume the myQueue object is a queue that can hold integers and that value is an int variable.1 myQueue.enqueue(0);2 myQueue.enqueue(1);3 myQueue.enqueue(2);4 myQueue.dequeue(value);5 Console.WriteLine(value);Assume that the dequeue function, called on line 4, stores the number removed from the queue in the value variable. What will the statement on line 5 display? Question 43 options: a) 2 b) 0 c) 1 d) none of these
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
Assume a linked list contains following integers: 2, 2, 4, 5, 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; Node<int> *aNode; while(curNode->getItem()<7){ aNode=curNode; curNode=curNode->getNext(); } a=aNode->getItem(); A. 5 B.8 C.0 D.7
C++ ProgrammingActivity: Linked List Stack and BracketsExplain the flow of the code not necessarily every line, as long as you explain what the important parts of the code do. The code is already correct, just explain the flow #include "stack.h" #include "linkedlist.h" // SLLStack means Singly Linked List (SLL) Stack class SLLStack : public Stack { LinkedList* list; public: SLLStack() { list = new LinkedList(); } void push(char e) { list->add(e); return; } char pop() { char elem; elem = list->removeTail(); return elem; } char top() { char elem; elem = list->get(size()); return elem; } int size() { return list->size(); } bool isEmpty() { return list->isEmpty(); } };
Problem 7: Assume that a queue class called XQueue has a no argument constructor, an enqueue() method, a dequeue() method and an isEmpty() method. Write a method that merges two given queues by copying the elements in an alternating sequence and returning the resulting combined queue. Note: make sure that you don't include unnecessary spaces in your answer! public XQueue merge(XQueue q1, XQueue q2) { XQueue neWQueue = new XQueue(); while (!q1.isEmpty() && !q2.isEmpty()) { newQueue.enqueue( #01 ); newQueue.enqueue( #02); } while (!q1.isEmpty()) { #03 ; } while (!q2.is Empty()) { #04 ; } return newQueue (); }
5. What is the output of the following program segment? linkedQueueType queue; queue.addQueue (10); queue.addQueue (20); cout tempQueue; tempQueue = queue; while (!tempQueue.isEmptyQueue ()) cout << tempQueue.frcnt () << " "; tempQueue. deleteQueue (); cout << endl; cout << queue.front () << " " << queue.back() '<< endl; 6 Supnose thiat queue is a queueTyne ohiect and the size of the array im