how you could implement a queue's enqueue and dequeue operations
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- Suppose you have access to a stack ADT library, that is, an Abstract Data Type that includes operations to maintain a stack. Describe in words (no need code or pseudocodes) how you could implement a queue's enqueue and dequeue operations using two stacks. Also, provide the Big-O complexity of your algorithm.Explain thoroughly the answers to the following questions: When is it appropriate to implement stack or queue using singly linked list, and when is it appropriate to implement them using doubly linked list? A queue can be implemented using stack. Explain how.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
- (2) Answer the following questions concerning lists, stacks, and queues Please be thorough with explanatio! (d) Suppose you are implementing a list of stacks. Let's say you decide to implement both the general list (the list of stacks) and each individual stack using a double linked list. Assume that there are currently N stacks in the list, and each stack has a maximum of K items, where N and K are both large. You are going to iterate through the general list and apply a single operation to each stack as you encounter it. Now answer the following four questions, using big-Theta notation: What is the average-case time complexity of pushing one additional item into each stack? What is the worst-case time complexity of pushing one additional item into each stack? What is the average-case time complexity of popping one item from each stack? What is the worst-case time complexity of popping one additional item from each stack? (For pops, if the stack is empty, you can assume that the pop…(2) Answer the following questions concerning lists, stacks, and queues: Please be thorough with explanation! (b) Now consider implementing a stack as a class that relies on a vector, keeping track of the current size and capacity of the vector in the main object. You consider two possibilities. The first is to push (insert) to the beginning and pop (remove) from the beginning of the vector. The second is to push to the end and pop from the end of the vector. (Either way, if the vector is full and a push is applied, the vector will be resized to double its current capacity.) Is one of these possibilities better than the other? Briefly explain your answer.Q3:- Consider an empty stack STK of size 5 (array-based implementation). What will be the output after applying the following stack operations? Draw a diagram in support of your answer. How many elements are there in the stack at the end of the processing? POP(), PUSH(25), PUSH(20), POP(), POP(), PUSH(45), PUSH(15), POP(), PUSH(30), PUSH(17), PUSH(33), PUSH(24), PUSH(54), POP(), PUSH(99)
- S and Q are integer stacks and priority queues, respectively. C mod 3 is the priority of an element C joining the priority queue Q. In other words, the elements' priority numbers are either 0 or 1 or 2. What is the output of the following code if A, B, and C are integer variables? However, the queue procedures have been modified to work on a priority queue. 1.A = 102.B = 113.C = A+B4.while (C < 110) do5. if (C mod 3) = 0 then PUSH (S,C)6. else ENQUEUE (Q,C)7. A = B8. B = C9. C = A + B10.end11.while not EMPTY_STACK (S) do12. POP (S,C)13. PRINT (C)14.end15.while not EMPTY_QUEUE (Q) do16. DEQUEUE (Q, C)17. PRINT (C)18.end10.12 It is possible for one linear structure to be more general than another.(a) Can a Queue be implemented using a Stack? What is the level of complexity of each Queue operation? (b) Can a Stack be implemented using a Queue? What are the various Stack techniques' complexities? 10.13 Explain how we could efficiently build a Queue as a pair of Stacks, known as a "stack pair." (Hint: Consider one of the stacks to be the head of the queue and the other to be the tail.)1. consider an array based queue implementation. suppose we wish to use an extra bit in the queue records to indicate whether a queue is empty. a. Modify the declarationsand operations for a circular queue to accomodate this feature. b. Would you see the change to be worthwide.
- 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; }Short answer: Answer the following in your own words: 1) Your friend says they implemented a stack as a linked list with reference pointers to both a head and the tail node (i.e. they implemented a stack as a double endedlinked list). They said this significantly improved the performance for all functions (push, pop, search, and update). Are they correct? Why or why not?10.12 There is a possibility that one linear structure is more universal than another.(a) Can a Stack be used to implement a Queue? What is the degree of difficulty of each Queue operation? (b) Can a Queue be used to implement a Stack? What are the complexity of the various Stack techniques? 10.13 Describe how we may efficiently construct a Queue as a pair of Stacks, referred to as a "stack pair." (Hint: Think of one stack as the head of the queue and the other as the tail.) 10.12 There is a possibility that one linear structure is more universal than another.(a) Can a Stack be used to implement a Queue? What is the degree of difficulty of each Queue operation? (b) Can a Queue be used to implement a Stack? What are the complexity of the various Stack techniques? 10.13 Describe how we may efficiently construct a Queue as a pair of Stacks, referred to as a "stack pair." (Hint: Think of one stack as the head of the queue and the other as the tail.) 10.12 There is a possibility that…