I will assume that you have a decent working knowledge of the singly linked list. Doubly Linked List Node. Link − Each link of a linked list can store a data called an element. Circular Singly Linked List 1. A node in a doubly linked list: A compound object that stores a reference to an element and two references, called next and prev, to the next and previous nodes, respectively. Want to be expert in various types of Linked Lists such as – Singly Linked List, Doubly Linked List and Circular Linked List? Examples: Input : 5 4 3 2 1 Output : 1 2 3 4 5 Input : 2 1 3 5 4 Output :1 2 3 4 5 They are also called sentinel nodes, indicating both the ends of a list. Doubly Linked List is a variation of Linked list in which navigation is possible in both ways, either forward and backward easily as compared to Single Linked List. Doubly linked list is a type of data structure that is made up of nodes that are created using self referential structures. For convenience, a doubly linked list has a header node and a trailer node. Pointer in the last node points back to the first node 3. Following are the important terms to understand the concept of doubly linked list. Each of these nodes contain three parts, namely the data and the reference to the next list node and the reference to the previous list node. Doubly Linked Lists A doubly linked list is a list that contains links to next and previous nodes. This course is here to help. Singly Linked list 1. Two “start pointers” – first element and last element 2. Begins with a pointer to the first node 2. Only traversed in one direction 2. 2/19 Linked Lists Types • Types of linked lists: 1. Following are advantages/disadvantages of doubly linked list over singly linked list. Here is a graphic representation of what each doubly linked list node looks like. Unlike singly linked lists where traversal is only one way, doubly linked lists allow traversals in both In contrast to the singly linked list, our doubly linked list node will have two pointers LITERALLY pointing to the next and previous node. 3) We can quickly insert a new node before a given node. such as a linked list can be used to implement applications like powerpoint. 2) The delete operation in DLL is more efficient if pointer to the node to be deleted is given. Advantages over singly linked list 1) A DLL can be traversed in both forward and backward direction. Example: Sort the given doubly linked list using bubble sort. Stacks, Queues, and Linked Lists Stacks (Last in/First out List) Operations: Push, Pop, Test Empty, Test Full, Peek, Size Queue(First in/First out List) Operations: Insert, Remove, Test Empty, Test Full, Peek, Size Linked List(A list of elements connected by pointers) Insert, Delete, Find, Traverse, Size Terminates with a null pointer 3. 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