What is the 'blockchain trilemma'?🔗

A. Security, speed, cost

B. Scalability, security, decentralization

C. Anonymity, compliance, performance

D. Proof of Work, Proof of Stake, DPoS

Which protocol enables atomic swaps between different blockchains?

A. Lightning Network ⚡

B. zk-SNARKs 🔒

C. Hashed TimeLock Contracts (HTLC) ⏳

D. Plasma

What is the main goal of an MEV (Miner Extractable Value)?

A. Minimize gas fees

B. Extract maximum value from mined blocks 💰

C. Secure validator nodes

D. Create tokens via ICO

What mechanism does Ethereum 2.0 use to achieve consensus?

A. Proof of Work ⛏

B. Delegated Proof of Stake đŸ—łïž

C. Proof of Authority đŸ›Ąïž

D. Proof of Stake 🔐

What does a rollup (e.g., zk-rollup or optimistic rollup) allow you to do?

A. Increase privacy

B. Reduce block size

C. Improve scalability by processing transactions off-chain 🚀

D. Prevent double spending

Which cryptocurrency is primarily used for decentralized lending on Aave?

A. USDC

B. DAI

C. WETH

D. All of the above 📩

What is an oracle in a smart contract?

A. A type of multisignature wallet

B. A market prediction tool

C. A provider of external data to the blockchain 📡

D. A specialized block explorer

What is the role of Curve Finance in DeFi?

A. Fixed-rate lending protocol

B. AMM optimized for stablecoins ⚖

C. Launchpad platform for ICO

D. Multi-chain bridge

What does an 'impermanent loss' indicate?

A. A loss related to a wallet hack

B. A fictitious loss in a yield farm due to volatility 📉

C. A permanent loss related to a bad liquidation

D. A loss due to a chain fork

What particular risk is associated with cross-chain bridges?

A. Double spending

B. Oracle manipulation

C. Excessive centralization

D. Critical security flaws leading to massive thefts 🔓