How linked lists are stored in memory.

Linked lists are typically implemented in memory using dynamically allocated nodes that are connected through pointers. Each node in the list contains two fields:

1. Data field: This field contains the actual data element that needs to be stored in the list.
2. Pointer field: This field contains the memory address of the next node in the list.

The first node in the list is called the head of the list and is used to access the rest of the nodes in the list. The last node in the list has a pointer field that is set to null, indicating the end of the list.

When a new node is added to the list, memory is dynamically allocated for the node and its data element is stored in the data field. The pointer field of the new node is then set to the memory address of the next node in the list, and the pointer field of the previous node is updated to point to the new node.

When a node is removed from the list, the pointer field of the previous node is updated to point to the next node in the list, and the memory occupied by the removed node is deallocated.

Linked lists can be implemented in different ways, such as singly linked lists, doubly linked lists, or circular linked lists, each with their own variations on how nodes are stored in memory. However, the basic idea is the same: using dynamically allocated nodes connected through pointers to create a flexible, dynamic data structure.