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What is Linked List ?

Linked List is one of the fundamental data structures.

It consists of a sequence of nodes, each containing arbitrary data fields and one or two (”links”) pointing to the next and/or previous nodes.

A linked list is a self-referential datatype because it contains a pointer or link to another data of the same type. Linked lists permit insertion and removal of nodes at any point in the list in constant time, but do not allow random access