WorksheetsBlockchain
Total questions: 15
Worksheet time: 8mins
What is the Byzantine Generals Problem?
A problem in distributed systems where participants must agree on a single decision despite faulty or malicious actors.
A problem in cryptography related to key distribution.
A problem in blockchain scalability.
A problem in network latency.
What is the main goal of solving the Byzantine Generals Problem?
To ensure all participants agree on a single decision.
To increase transaction speed in blockchain networks.
To reduce energy consumption in mining.
To improve wallet security.
Which of the following is a solution to the Byzantine Generals Problem?
Proof-of-Work (PoW).
Proof-of-Stake (PoS).
Both A and B.
None of the above.
What is the primary purpose of Bitcoin mining?
To create new Bitcoin.
To validate transactions and add them to the blockchain.
To increase the price of Bitcoin.
To store private keys.
What is the maximum supply of Bitcoin?
10 million.
21 million.
50 million.
Unlimited.
What is a Bitcoin wallet?
A physical device to store Bitcoin.
A software or hardware tool to store private and public keys.
A place to mine Bitcoin.
A type of blockchain.
What is Proof-of-Work (PoW)?
A consensus mechanism where miners solve cryptographic puzzles to validate transactions.
A consensus mechanism where validators are chosen based on the amount of cryptocurrency they hold.
A method to increase transaction speed.
A way to store private keys securely.
What is Proof-of-Stake (PoS)?
A consensus mechanism where validators are chosen based on the amount of cryptocurrency they hold.
A consensus mechanism where miners solve cryptographic puzzles.
A method to increase energy efficiency in mining.
A way to store private keys securely.
Which of the following is a disadvantage of Proof-of-Work (PoW)?
High energy consumption.
Low security.
Centralization of power.
Limited scalability.
Which of the following is a use case for blockchain technology?
Supply chain management.
Digital identity verification.
Decentralized finance (DeFi).
All of the above.
What is a smart contract?
A self-executing contract with terms written in code.
A physical contract stored on the blockchain.
A type of cryptocurrency.
A method for mining Bitcoin.
Which of the following is NOT a blockchain application?
Cryptocurrency.
Centralized banking.
Decentralized voting systems.
Supply chain tracking.
What is a 51% attack?
An attack where a single entity controls more than 50% of the network's mining power.
An attack where a hacker steals private keys.
An attack where a blockchain is split into two chains.
An attack where a wallet is hacked.
What is a double-spending attack?
Spending the same cryptocurrency twice.
Stealing private keys from a wallet.
Hacking a blockchain network.
Creating fake transactions.
Which of the following is a risk of using Bitcoin?
Price volatility.
Loss of private keys.
51% attacks.
All of the above.
