Block Chain 4

Two vital data structures used in blockchain include

• Pointers and Linked List

• Graph and Tree

• Pointers & Graphs

• Consensus and Ledgers

Which block has a pointer with no value

• First block

• Last Block

• Both First as well as Last

• Exactly Middle Block

The ................................. is the hash of all the transactions in a block in a blockchain network

• Merkel Node

• Merkle root

• Merkel Tree

• Merkel graph

What are the 2 types of Nodes in Blockchain

• Validator Node and Member Node

• Ledger node and List node

• Merkel Node and Header Node

• Transaction node and Member Node

Name the specific nodes which perform the block verification process before adding anything to the blockchain structure?

• Miner Node

• Consensus node

• Merkel Node

• Root Node

A ............................................ is a self-regulatory stack of software protocols written into a blockchain’s code that synchronizes a network into agreement about the state of a digital ledger

• HTTP

• Ledger Mechanism

• Consensus mechanism

• Bitcoin Transaction

Miners compete to solve a cryptographic puzzle that involves finding a hash value (a unique digital fingerprint) that meets certain criteria ...............................................

• Nonce Guessing

• Block Formation

• Transaction Broadcasting

• Block Addition

In ............................................., validators are chosen to create and validate new blocks based on the number of coins they hold and are willing to "stake" as collateral

• Proof of Work

• Proof of Stake

• Proof of Activity

• Proof of Importance

Proof of Importance (PoI) is a consensus algorithm that was introduced by the NEM (New Economy Movement) blockchain platform. It is designed to determine which network participants, known as .................................................................... in NEM's terminology, are eligible to create new blocks and earn rewards.

• "rewarder"

• "harvesters"

• "Corruptor"

• "negotiator"

What is QKD

• Quantum Key Digital

• Quantum Krypto Distribution

• Quantum Key Distribution

• Quantum Key Design