Test 3 - Cryptography and Cryptocurrency (1)

False

True

Not Given

Both T & F

On a SQLite database service

On a SQL database service

On a centralized immutable ledger

On a distributed immutable ledger

A blockchain consists of growing list of transactions.

There is usually one transaction stored inside a block of blockchains.

All statements are correct.

Blocks in blockchains could be at a normal security level for preventing attacks from unauthorized parties.

The distributed ledger technology (DLT) could be used for implementing a blockchain

Growing Pains

Environmental Impact

False Narratives

Immutable

It only uses proof-of-work as consensus protocol for transaction validation

Many current cryptocurrencies are public blockchains

It only uses proof-of-stake as consensus protocol for transaction validation

It is accessible to anyone who wants to request or validate a transaction

Unspent Transaction Output

Unique Transaction Offer

Unspent Trade Offer

Unspent Transaction Xeroxed Output

to provide smart contracts' services

to provide cloud computing's services

to create a market for cryptocurrency exchange

to introduce a mechanism of exchanging digital assets

Supply chain management

All activities should be

Internal Voting

Asset ownership

The block #0 of a blockchain

Any block created by the blockchain author

The final block of a blockchain

The first transaction in each block

They define the inputs and outputs of transactions

They are actual currency that is sent to the receiver of a transaction

They are transaction output that has been expended

They are total rewards for miners in the network