Data Analytics in Blockchain

What does UTXO stand for?

A) Unspent Transaction Output
B) Unverified Transaction Order
C) Unallocated Transaction Ownership
D) Unencrypted Transaction Origin

Which cryptocurrency is most closely associated with the UTXO model?

A) Ethereum
B) Ripple (XRP)
C) Bitcoin
D) Cardano

What is the purpose of a UTXO?

A) To track the total supply of a cryptocurrency
B) To prevent double spending
C) To facilitate smart contracts
D) To verify transaction signatures

How are UTXOs created?

A) By miners during the mining process
B) By wallet software when receiving funds
C) By validators in a proof-of-stake network
D) By smart contracts on the blockchain

Which part of a transaction becomes a UTXO?

A) The input
B) The output
C) Both input and output
D) Neither input nor output

From a user’s perspective, what happens when they spend Bitcoin?

A) They see UTXOs being created
B) They see the amount deducted from their wallet
C) They receive UTXOs as change
D) They directly manipulate UTXOs

What role do UTXOs play in preventing double spending?

A) They ensure that transactions are irreversible
B) They track the ownership of unspent coins
C) They validate transaction signatures
D) They create new coins during mining

How are UTXOs measured?

A) In denominations like satoshis or gwei
B) In whole numbers of coins
C) In fractions of a UTXO
D) In kilobytes of data

Which network component processes UTXOs?

A) Miners
B) Nodes
C) Validators
D) Wallets

What is the primary benefit of using the UTXO model?

A) Enhanced privacy
B) Faster transaction confirmation
C) Lower transaction fees
D) Improved scalability

What is the primary purpose of the Account/Balance model in blockchain systems?

A) To track the total supply of a cryptocurrency
B) To prevent double spending
C) To facilitate smart contracts
D) To manage transaction inputs and outputs

How does the Account/Balance model differ from the UTXO model?

A) It uses stateful accounts and smart contracts.
B) It relies on unspent transaction outputs (UTXOs).
C) It is more scalable and private.
D) It measures value in satoshis or gwei.

Which blockchain platform prominently employs the Account/Balance model?

A) Bitcoin
B) Ethereum
C) Cardano
D) Ripple (XRP)

What happens when a user spends cryptocurrency from their account in the Account/Balance model?

A) New UTXOs are created.
B) The balance remains unchanged.
C) The balance decreases.
D) The transaction is reversible.

What is a key advantage of the Account/Balance model?

A) Enhanced privacy
B) Faster transaction confirmation
C) Lower transaction fees
D) Improved scalability

What does a hybrid crypto exchange combine?

A) Centralized and decentralized exchanges
B) Traditional banking and blockchain
C) Proof-of-work and proof-of-stake mechanisms
D) Public and private keys

What advantage does a hybrid exchange offer over purely centralized exchanges?

A) Higher liquidity
B) Enhanced security
C) Lower transaction fees
D) Benefits of both centralized and decentralized platforms

Which component of the hybrid model ensures users retain control of their private keys?

A) Centralized order matching
B) Decentralized liquidity pools
C) Smart contracts
D) Decentralized aspects

What is a challenge associated with implementing a hybrid exchange?

A) Complexity
B) Lack of liquidity
C) Regulatory compliance
D) Slow transaction confirmation

Which cryptocurrency exchange exemplifies the hybrid model by offering both centralized and decentralized trading options?

A) Coinbase
B) Binance
C) Kraken
D) Bitfinex

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