PYTHON BLOCKCHAIN QUIZ DESCRIPTION

Does a transaction generate new UTXOs for transferring the amount specified in the input UTXOS?

  • False

  • True

What are mechanisms that allow tokens and other digital assets from one blockchain to be securely used in a separate blockchain called?
 

  • Parachains
     

  •  Blockbabies
     

  • Sidechains
     

  •  Altchains

A popular public-private key implementation known as Rivest-Shamir Adelman (RSA) algorithm is used for the Bitcoin and Ethereum Blockchain.

  • False

  • True

Bitcoin is created by ______.
 

  • Saifedean Ammius
     

  • Satoshi Nakamoto
     

  • Vitalik Buterin
     

  • None of these

What does P2P stand for?

  •  Peer to Peer
     

  • Product to Product
     

  •  Password to Password
     

  • None of the above

Which is/are the applications of Blockchain?

  • Cross-border payments
     

  •  Anti-money laundering tracking system
     

  • Supply chain and logistics monitoring
     

  •  All the above

Transactions per second (TPS) for Proof-of-Work Blockchain are approximate?

  • 24K per second
     

  • 175K per second
     

  • Only limited to the number of nodes on the network
     

  • 7-15 per second
     

A blockchain enables peer-to-peer transfer of digital currency without any intermediaries such as banks.

  • False

  • True

 Smart Contract characteristics do not include:

  • Alterable
     

  • Fast and cost-effective
     

  •  A high degree of accuracy
     

  •  Transparency

Transaction 0 in every block of the bitcoin blockchain________.

  • Is for paying the miner fees
     

  •  Does not have any input UTXO
     

  • Is called the coinbase transaction
     

  •  All of the above

If a hacker wanted to alter a blockchain, what percentage of the block copies would he have to alter?

  • Only his copy
     

  • 1%
     

  •  51%
     

  • 100%

What is the purpose of a Nonce?

  • Follows nouns
     

  • A Hash Function
     

  • Prevents Double Spending
     

  •  Send Information to the Blockchain Network

BATM stands for _____.

  • Bounded access transaction machine
     

  •  Broadcast ATM
     

  • Bitcoin ATM
     

  • Blockchain ATM

The height of the block is the ____ in the chain between it and the genesis block.

  • Metadata that is
     

  •  Number of blocks
     

  • Merkle tree hash
     

  • Size of the memory cache

Blockchain has ____ versions.

  • 2

  • 3

  • 4

  • 5

What type of hash is used when there is a fixed number of items to be hashed, such as the items in a block header, and we are verifying the composite block integrity?

  • Tree-structured Hash
     

  •  Complex hash
     

  •  Simple Hash
     

  •  Either

Hash identifying each block in the blockchain is generated using which of the following cryptographic algorithm?

  • SHA128
     

  • SHA256
     

  •  Both of them
     

  • None of them

What does a block in a Blockchain have?

  • Header & Digital ledger
     

  • Bitcoins & Input
     

  • Transactions & Bitcoins
     

  •  Header & Transaction

What is Not a Ledger type considered by users in Blockchain?

  • Distributed Ledger
     

  •  Decentralized Ledger
     

  •  Both A and B
     

  • None of these

Blockchain networks are much _____ and deal with no real single point of failure.
 

  • Simpler
     

  • Easier to scale
     

  •  Convenient
     

  • Faster

Where is a Blockchain’s central server?

  • Where the blockchain is created
     

  •  Located with the owner of the server
     

  • There is no central server, it is distributed
     

  • Ordered Node

What is the genesis block?

  • Any block created by the founder
     

  •  The last block created in the Blockchain
     

  •  The first block of a Blockchain
     

  •  The first transaction in each block

What biblical name is given to the first block in blockchain?

  • Primal
     

  • Origin
     

  •  Genesis
     

  •  Ada

Blockchain does not provide?

  • Security
     

  •  Immutability
     

  •  Fault tolerance
     

  •  Fast transaction time

What type of hash function is used, when there is a variable number of items to be hashed, such as the many state changes in a block?

  • Complex hash
     

  • Simple Hash
     

  •  Tree-structured Hash
     

  •  Either

Did Blockchain enable a centralized or a decentralized system for the exchange of value?

  • Decentralized
     

  • Centralized
     

  •  None of the above
     

  •  Can't say

What is a DApp?

  • A type of cryptocurrency
     

  •  A condiment
     

  •  A type of blockchain
     

  •  A decentralized application

_________ receive verify, gather and execute transactions.

  • Miner nodes
     

  • Smart Contracts
     

  •  Light wallets
     

  •  Ethereum full node

How often does the Bitcoin ledger reconcile?

  • Every day
     

  •  Every 3 months
     

  • Every 3 minutes
     

  • Every 10 minutes

What is a smart contract?

  • Programs stored on a blockchain that run when predetermined conditions are met
     

  •  Online contract
     

  • Digital contract
     

  • All the above