Linked lists with header nodes are... (Points: 2) A. useful for simplifying boundary cases (inserting/deleting at start of list). B. useful for handling frequently empty lists. C. useful if you need to change direction frequently. D. (a) and (b). E. All of the above.

JavaScript Given a singly linked list of integers, determine whether or not it's a palindrome. // Singly-linked lists are already defined with this interface: // function ListNode(x) { // this.value = x; // this.next = null; // } // function isListPalindrome(head) { }   Note: in examples below and tests preview linked lists are presented as arrays just for simplicity of visualization: in real data you will be given a head node l of the linked list Example For l = [0, 1, 0], the output should beisListPalindrome(l) = true; For l = [1, 2, 2, 3], the output should beisListPalindrome(l) = false.

Describe how to construct a doubly linked list.

A-1: Let l = [−1, −2, . . . , −10] be an existing list. Construct a new list from l by dividing each evennumber element in l by 2. Print the new list. Do not use NUMPY library.A-2: Create a new list containing the following elements using list comprehension:[1, −1, 2, −2, 3, −3, ..., 9, −9]A-3: Consider the following coded string. Create a list of all contiguous (connected without space) lettersin the order of their appearance."Vjg dguv rtqitcou ctg ytkvvgp uq vjcv eqorwvkpi ocejkpgu ecp rgthqto vjgoswkemn{0 Cnuq. vjg dguv rtqitcou ctg ytkvvgp uq vjcv jwocp dgkpiu ecp wpfgtuvcpfvjgo engctn{0 C iqqf guuc{kuv cpf c iqqf rtqitcoogt jcxg c nqv kp eqooqp0"A-4: In the list obtained after executing task(s) from Part(A-3), remove newline characters (if any).A-5: For the list obtained after executing task(s) from Part(A-4), for each word in the list do thefollowing:ˆ Breakdown the word into list of letters.ˆ Convert each of the above letters into integer, using ord() function.ˆ Update the…

An approach to remove nodes from a linked list that have the same key is provided.