Data Structures Questions
The main difference between a singly linked list and a doubly linked list is the number of references each node has.
In a singly linked list, each node contains a reference to the next node in the list. This means that traversal can only be done in one direction, from the head to the tail. Each node only has knowledge of the next node, making it efficient in terms of memory usage but limiting in terms of operations like searching for a specific node or deleting a node.
On the other hand, in a doubly linked list, each node contains references to both the next and the previous nodes in the list. This allows for traversal in both directions, from the head to the tail and vice versa. Each node has knowledge of both the previous and next nodes, making it more flexible for operations like searching, inserting, and deleting nodes. However, this additional reference requires more memory compared to a singly linked list.