6. Which consensus mechanism does Bitcoin use?
A) Proof of Stake
B) Proof of Work
C) Proof of Authority
D) Delegated Proof of Stake
7. What is the max supply of Bitcoin?
A) 10 million BTC
B) 21 million BTC
C) 50 million BTC
D) 100 million BTC
8. What does HODL mean?
A) Hold on for dear life
B) High on daily liquidity
C) Hold over daily losses
D) Harness optimal distributed ledger
9. What is Cardano’s consensus mechanism?
A) Proof of Work
B) Proof of Stake
C) Proof of Authority
D) Delegated Proof of Stake
10. Which coin is used in Ethereum’s smart contracts?
A) Bitcoin
B) Ethereum
C) Dogecoin
D) Tether
11. What is the primary function of a crypto wallet?
A) Store private keys
B) Mine coins
C) Facilitate peer-to-peer trading
D) Convert coins to fiat
12. What is the main purpose of stablecoins?
A) Increase volatility
B) Maintain value stability
C) Facilitate anonymous transactions
D) Cross-border payments
13. Which blockchain uses zk-SNARKs for privacy?
A) Bitcoin
B) Zcash
C) Litecoin
14. Which platform is a decentralized exchange (DEX)?
A) Binance
B) Kraken
C) Uniswap
D) Bitfinex
15. What is a key feature of decentralized finance (DeFi)?
A) Centralized control
B) Peer-to-peer lending
C) Smart contracts
D) Fiat-backed tokens
16. Which coin is designed for fast transactions?
A) Litecoin
B) Bitcoin
C) Dash
17. Which coin is mainly used for cross-border payments?
A) Ripple (XRP)
B) Bitcoin
C) Ethereum
18. What is the term for validating transactions in a blockchain?
A) Mining
B) Staking
C) Forging
D) Delegating
19. Which of these is a stablecoin?
A) Bitcoin
B) Dogecoin
C) USDT
D) Chainlink
