The blockchain data structure is a back-linked list of blocks of transactions, which is ordered. It can be stored as a flat file or in a simple database. Each block is identifiable by a hash, generated using the SHA256 cryptographic hash algorithm on the header of the block.
Linked lists are linear data structures that hold data in individual objects called nodes. … Linked lists are often used because of their efficient insertion and deletion. They can be used to implement stacks, queues, and other abstract data types.
The linked list requires more memory to store the elements than an array, because each node of the linked list points a pointer, due to which it requires more memory. It is very difficult to traverse the nodes in a linked list.
Types of Linked List
- Simple Linked List − Item navigation is forward only.
- Doubly Linked List − Items can be navigated forward and backward.
- Circular Linked List − Last item contains link of the first element as next and the first element has a link to the last element as previous.
|Que.||What kind of linked list is best to answer question like “What is the item at position n?”|
|b.||Doubly linked list|
|c.||Circular linked list|
|d.||Array implementation of linked list|
|Answer:Array implementation of linked list|
What are the 2 main types of data structures?
There are two fundamental kinds of data structures: array of contiguous memory locations and linked structures.
There are three common types of Linked List.
- Singly Linked List.
- Doubly Linked List.
- Circular Linked List.