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 Array

 

            Linked Lists

A data structure consisting of a collection of elements each identified by the array index A linear collection of data elements whose order is not given by their location in memory It supports random access, so the programmer can directly access an element in the array using the index It supports sequential access, so the programmer has to sequentially go through each element or node until reaching the required element Elements are stored in contiguous memory location Elements can be stored anywhere in the memory Programmer has to specify the size of the array at the time of declaring the array There is no need for specifying the size of a linked list Memory allocation happens at compile time Memory allocation happens at run time It is a static memory allocation It is a dynamic memory allocation Elements are independent of each other An element or node points to the next bode or both next node and previous node Size of an array is fixed Size of an array is not fixed Array elements can be modified easily by identifying the index value Linked list is a complex process for modify node in a linked list Array elements cannot be added deleted once it is declared Nodes in the linked list can be added and deleted from the list

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Difference between Array and Linked List ?

Array Linked List
Arrays are index-based data structure where each element
associated with an index.		 Linked list relies on references where each node consists of the data and the references to the previous and next element (in case of a doubly linked list) or the next element (in case of a singly linked list).
Array provides fast and random access. Elements can’t be accessed randomly but can be
accessed only sequentially and accessing element takes 0(n) time.
Elements are stored in consecutive manner in memory. Elements can be stored at any available place as
address of node is stored in previous node.
Insertion & deletion takes more time in array as elements
are stored in consecutive memory locations.		 Insertion & deletion are fast & easy in linked list
as only value of pointer is needed to change.
In array, memory is allocated at compile time
i.e. Static Memory Allocation.		 Memory is allocated at run time
i.e. Dynamic Memory Allocation.
Array can be single dimensional, two dimensional
or multidimensional.		 Linked list can be singly, doubly or circular
linked list.
Each element is independent, no connection with previous
element or with its location.		 Location or address of elements is stored in the
link part of previous element/node.
Difference between Array and Linked List
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