PYTHON BLOCKCHAIN QUIZ DESCRIPTION

 Smart Contract characteristics do not include:

  • Alterable
     

  • Fast and cost-effective
     

  •  A high degree of accuracy
     

  •  Transparency

What does a block in a Blockchain have?

  • Header & Digital ledger
     

  • Bitcoins & Input
     

  • Transactions & Bitcoins
     

  •  Header & Transaction

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

For the simple symmetric key example discussed in the lecture, it is easy to derive the secret key from the encrypted data.

  • True

  • False

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

  • Primal
     

  • Origin
     

  •  Genesis
     

  •  Ada

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

Which is/are the applications of Blockchain?

  • Cross-border payments
     

  •  Anti-money laundering tracking system
     

  • Supply chain and logistics monitoring
     

  •  All the above

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 is the purpose of a Nonce?

  • Follows nouns
     

  • A Hash Function
     

  • Prevents Double Spending
     

  •  Send Information to the Blockchain Network

What does UTXO stand for?

  • Unspent Trade Offer
     

  • Unspent Transaction xeroxed Output
     

  • Unique Transaction Offer
     

  • Unspent Transaction Output

Blockchain can perform user transactions without involving any third-party intermediaries.

  • With the help of the third party
     

  • Without involving any third party
     

  • Without involving any owned
     

  • Without involving any authenticated

Who introduced the digital online cryptocurrency known as Bitcoin?

  • Satoshi Nakamoto
     

  • Nick Szabo
     

  • Wei Dai
     

  • Hal Finney

Which of the following problems did Blockchain solve for cryptocurrencies?

  • Anonymity
     

  •  Double Spending
     

  • Destination of currencies
     

  • None of the above

BATM stands for _____.

  • Bounded access transaction machine
     

  •  Broadcast ATM
     

  • Bitcoin ATM
     

  • Blockchain ATM

Bitcoin is a cryptocurrency, which is an application of Blockchain.

  • True

  • False

What does P2P stand for?

  •  Peer to Peer
     

  • Product to Product
     

  •  Password to Password
     

  • None of 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
     

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

  • Simpler
     

  • Easier to scale
     

  •  Convenient
     

  • Faster

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

  • Decentralized
     

  • Centralized
     

  •  None of the above
     

  •  Can't say

Bitcoin is based on _________ blockchain.

  • Private
     

  •  Public
     

  •  Public Permissioned
     

  • Permissioned

A contract in size is restricted to,

  • 24576 Bytes
     

  • 1 Kilo Bytes
     

  • 23575 Bytes
     

  • No limit

The transaction Merkle Tree root value in a Bitcoin block is calculated using,

  • Hash of transactions
     

  • Previous block's hash
     

  •  Number of transactions
     

  •  None of the above

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

  • False

  • True

What is a smart contract?

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

  •  Online contract
     

  • Digital contract
     

  • All the above

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

Blockchain is a ______ ?

  • Push technology
     

  • Pull technology
     

  • Both push and pull technology
     

  • None of the above

What is Blockchain?

  • A currency
     

  •  A ledger
     

  •  A type of currency
     

  • A distributed ledger on a peer-to-peer network

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

  • Distributed Ledger
     

  •  Decentralized Ledger
     

  •  Both A and B
     

  • None of these

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

  • False

  • True

Blockchain does not provide?

  • Security
     

  •  Immutability
     

  •  Fault tolerance
     

  •  Fast transaction time