Which block has a pointer with no value

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

What are the 2 types of Nodes in Blockchain

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

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

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

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 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.

What is QKD