mplement a double-ended queue. It is a variation where enqueues and dequeues are allowed on both ends. Implement the following double-ended queue operations using circular array representation with variables for the front and rear indices: a. new b. clear c. enqueueFront d. enqueueRear e. dequeueFront f. dequeueRear g. isEmpty h. isFull i. peek
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- A deque data structure and a queue are related ideas. The abbreviation "deque" stands for "double-ended queue." A deque differs from the other two in that you may insert, remove, or view from either end of the queue. Implement a deque using arrays.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).If an array of size 6 is used to implement a circular queue, and the current values of rear and front are O and 3 respectively, when one element is removed from the queue and two more elements are added, what are the values of rear and front, respectively? O 1, 5 O 4, 2 5, 1 O 2, 3 None of the above
- In Javascript an array can be treated like a queue---a FIFO (first-in, first-out) data structure. Which two array operations that we studied in class can be used together to treat an array as a queue? a. isEmpty() and isFull() b. queue() and unqueue() c. unshift() and pop() d. push() and pop() e. unshift() and shift()We can declare a new array and copy the items of the old queue to new and by this, it will extend the size of the queue.An array of size MAX_SIZE is used to implement a queue. head, tail, and size are tracked. Suppose front is 0 and rear is MAX_SIZE -1. How many elements are present in the queue? a. 0 b. MAX_SIZE-1 c. MAX_SIZE d. 1
- A data structure called a deque is closely related to a queue. The name deque stands for “double-ended queue.” The difference between the two is that with a deque, you can insert, remove, or view from either end of the queue. Implement a deque using arraysUsing the three properties: implement the queue interface using a circular array ▪ O array Array object, initialized capacity O front_index-int, index where you dequeue back_index-int, index where you enqueue O Don't add or use other properties other than the three above. Wrap - around: set index back to 0 after the limit has been exceeded. Implement size, enqueue (), dequeue (). front () Size property - compute using front_index and back_index Must have two cases: Case 1: front_index <= back_index (normal) Case 2: back_index < front_index (wrap-around) enqueue(item): front (): add item to the next available array cell - update back_index: wrap-around if exceeds index limit Before array becomes full (one empty slot left), create a bigger array with 2x capacity (note: don't use expand) Copy current queue items to bigger array (make sure you keep the same queue order) Case 1: front_index < back_index (normal) Case 2: back_index < front_index (wrap-around) Update array, front_index,…Implement a Single linked list to store a set of Integer numbers (no duplicate) • Instance variable• Constructor• Accessor and Update methods 2.) Define SLinkedList Classa. Instance Variables: # Node head # Node tail # int sizeb. Constructorc. Methods # int getSize() //Return the number of nodes of the list. # boolean isEmpty() //Return true if the list is empty, and false otherwise. # int getFirst() //Return the value of the first node of the list. # int getLast()/ /Return the value of the Last node of the list. # Node getHead()/ /Return the head # setHead(Node h)//Set the head # Node getTail()/ /Return the tail # setTail(Node t)//Set the tail # addFirst(E e) //add a new element to the front of the list # addLast(E e) // add new element to the end of the list # E removeFirst()//Return the value of the first node of the list # display()/ /print out values of all the nodes of the list # Node search(E key)//check if a given…
- Java help, can you please explain this I'm a beginner and I'm lost:( Implement a nested class DoubleNode for building doubly-linked lists, where each node containsa reference to the item preceding it and the item following it in the list (null if there is no suchitem). Then implement methods for the following tasks:• Print the contents of the list• Insert at the beginning• Insert at the end• Remove from the beginning• Remove from the end• Insert before a give node (Insert before the first occurrence of the node, if thenode exists; else insert at the end)• Insert after a given node (Insert after the first occurrence of the node, if the nodeexists; else insert at the end)• Remove a given node (Remove the first occurrence of the node, remove nothing ifnode not found)• Move to front (move the first occurrence of the node to the front)• Move to end (moved and first occurrence of the node to the end)Write a tester program and test your implementation. You must test each of these cases…QueueArray.java This file implements QueueInterface.java This file has * attributes of an array holding queue elements. An integer represents front * index, an integer for rear index, and an integer to keep track number of * elements in the queue. An overloaded constructor accepts an integer for * initializing the queue size, e.g. array size. An enqueue method receives an * object and place the object into the queue. The enqueue method will throw * exception with message "Overflow" when the queue is full. A dequeue method * returns and removes an object from front of the queue. The dequeue method * will throw exception with message "Underflow" when the queue is empty. A size * method returns number of elements in the queue. A toString method returns a * String showing size and all elements in the queue.Create a class to implement a queue using a circular array. The class should contain functions to: I. Insert a new valueII. Delete a value.III. Change a value equal to X to a value equal to Y.IV. Count all value equal to X in the queue. B. For each function above perform an asymptotic analysis and state the worst case performance of the algorithm NB: I'm having issues with this particular course so I'd appreciate a thorough, in depth and well explained answer. Thanks