#READING LINKED LIST STACK BACKWARDS HOW TO#
#READING LINKED LIST STACK BACKWARDS UPDATE#
#READING LINKED LIST STACK BACKWARDS PLUS#

In this series of articles, we will study the following types of linked lists along with their different functionalities.

In Big O terms, worst-case access time is O(n). Unlike Arrays, where you can directly access an item, you cannot access a linked list item directly since the only information you have is the reference to the first item.Since each linked list item has to store the reference to the next item, some extra memory is required.However, there are some downsides to the linked list as well. Owing to its flexibility, a linked list is more suitable for implementing data structures like stacks, queues, and lists.

#READING LINKED LIST STACK BACKWARDS UPDATE#

On the other hand, linked list items are not stored in a contiguous memory location, therefore you can easily update linked lists. Since arrays require contiguous memory locations, it is very difficult to remove or insert an item in an array since the memory locations of a large number of items have to be updated.In cases where sufficient items are not available to fill all array index, memory space is wasted. On the other hand, in case of the array, memory has to be allocated in advance for a specific number of items. Whenever a new item is required to be added to the linked, the memory for the new node is created at run time. No memory is allocated for a linked list data structure in advance. A linked list is a dynamic data structure which means that the memory reserved for the link list can be increased or reduced at runtime.The reference to the first node is also known as the start node. In order to traverse a linked list, you just need to know the memory location or reference of the first node, the rest of nodes can be sequentially traversed using the reference to the next element in each node. One pair of the linked list item and the reference to next item constitutes a node.įor instance, if a node consists of 34|10, it means that the value of the node is 30, while the next item is stored at the memory location '10'. For each item in the memory location, linked list stores value of the item and the reference or pointer to the next item. Linked lists, do not store data at contiguous memory locations. Linked Lists, on the other hand, are different.

#READING LINKED LIST STACK BACKWARDS PLUS#

To find the third item in an array, you can simply use the starting index of the first item, plus the size of the first item, plus the size of the second item, plus 1. Therefore, it is straight forward to traverse an array. For instance, if the first item in the array is stored at index 10 of the memory and is of size 15 bytes, the second item will be stored at index 10+15+1 = 26th index. In arrays, the data is stored at contiguous memory locations. What is a Linked List?īefore we study what are linked lists, let's first briefly review how Arrays store data.

#READING LINKED LIST STACK BACKWARDS HOW TO#

We will see what are the different types of linked lists, how to traverse a linked list, how to insert and remove elements from a linked list, what are the different techniques to sort a linked list, how to reverse a linked list and so on.Īfter reading this article, you should be able to crack all the linked list interview questions. In this article, we will study linked lists in detail. Import .Linked lists are one of the most commonly used data structures in any programming language.

Reading linked list stack backwards