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WorksheetsACC5044-Week 4
Total questions: 27
Worksheet time: 27mins
What is the primary purpose of cryptography?
To create digital currencies
To protect confidential information through codes
To mine cryptocurrencies
To regulate the internet
Who were the cryptographers that published a paper on public-key cryptography in 1976?
Satoshi Nakamoto and Vitalik Buterin
Whitfield Diffie and Martin Hellman
Nick Szabo and Hal Finney
Claude Shannon and Alan Turing
What does a cryptocurrency wallet store?
Digital currency only
Public and private keys
Cryptocurrency mining software
Blockchain technology
What was the main contribution of Satoshi Nakamoto in the field of cryptocurrency?
Inventing public-key cryptography
Developing the first blockchain
Publishing the Bitcoin white paper
Creating the first digital wallet
Blockchain technology was first introduced as the underlying technology for which cryptocurrency?
What is a distributed ledger?
A) A centralized database
B) A digital currency
C) A database spread across a network of computers
D) A type of cryptocurrency wallet
What role do nodes play in a blockchain network?
A) They only store data without verifying transactions
B) They perform transactions
C) They verify transactions and maintain the blockchain
D) They regulate the price of cryptocurrencies
Which consensus mechanism is used by Bitcoin?
A) Proof-of-Stake (PoS)
B) Delegated Proof-of-Stake (DPoS)
C) Proof-of-Work (PoW)
D) Byzantine Fault Tolerance (BFT)
What is the function of smart contracts?
A) To mine new cryptocurrencies
B) To automate the execution of contracts on a blockchain
C) To serve as digital wallets
D) To regulate cryptocurrency exchanges
What is unique about stablecoins?
A) They are used for mining
B) They maintain a stable value relative to an asset
C) They can only be used in gaming
Cryptography has been used since:
The 20th century
The invention of the internet
Ancient times
1976
The earliest evidence of cryptography was found in:
The writings of Whitfield Diffie and Martin Hellman
Bitcoin's white paper
Ancient Egypt
The 20th century computer algorithms
What is a key characteristic of public-key cryptography?
It uses the same key for encryption and decryption
It is based on the blockchain technology
It utilizes two keys for secure communication
It is only used in cryptocurrency transactions
Which type of wallet provides physical storage for private keys?
Hardware wallets
Software wallets
Paper wallets
Digital wallets
The process by which new cryptocurrencies are created is called:
Encryption
Decryption
Mining
Trading
Which device is NOT typically used for cryptocurrency mining?
CPU
GPU
ASIC
RFID
What does a cryptocurrency exchange do?
Mines cryptocurrencies
Provides a platform for buying and selling cryptocurrencies
Stores digital currencies
Encrypts transaction data
A public key is used for:
Mining cryptocurrencies
Receiving digital currency payments
Storing cryptocurrencies offline
Generating cryptocurrencies
What is NOT a feature of blockchain technology?
Centralized control
Transparency
Security
Decentralization
Proof-of-Work requires:
A consensus on transaction validity
Solving complex mathematical puzzles
Staking digital currencies
A physical exchange of assets
Which of the following is NOT an application of blockchain technology?
A consensus on transaction validity
Solving complex mathematical puzzles
Staking digital currencies
A physical exchange of assets
The concept of hashing is used in blockchain to:
Increase the speed of transactions
Create a unique digital fingerprint of each block
Store cryptocurrencies securely
Generate new cryptocurrencies
What mechanism allows blockchain nodes to reach agreement?
Central authority decision
Consensus mechanism
Public-key cryptography
Smart contracts
What is the primary function of a cryptocurrency wallet?
To mine cryptocurrencies
To store and manage public and private keys
To create new cryptocurrencies
To perform blockchain transactions
Which of the following is a characteristic of stablecoins?
High volatility
Pegged to an underlying asset for stability
Used primarily for blockchain development
Unlimited supply
What describes the role of ASICs in cryptocurrency mining?
They are a type of software for mining
Specialized mining devices designed for efficiency
A form of digital currency
A consensus mechanism
A block in a blockchain contains:
Only transaction data
Only the hash of the previous block
A header and a body with transactions
Smart contracts only
