Quiz on Gas, Cryptocurrency, and Blockchain

In Ethereum, "Gas" refers to:

• Storage capacity

• Computational effort

• Network bandwidth

• Cryptocurrency units

What happens if the gas limit for a transaction is set too low?

• Transaction is delayed until gas prices drop

• Transaction fails but still consumes gas used up to that point

• Transaction is completed partially

• Transaction is queued until more gas is provided

Who sets the **block gas limit** in Ethereum?

• Users

• Miners

• Smart contract developers

• Exchanges

Gas price in Ethereum is usually measured in:

• Bitcoin

• Wei

• Gwei

• Ether

If Alice sets her gas limit at 25,000 but uses only 21,000, the unused gas is:

• Lost forever

• Refunded to her

• Given to the next miner

• Stored in the contract

Which of the following is **NOT** a feature of cryptocurrency?

• Decentralization

• Cryptography-based security

• Central bank regulation

• Global accessibility

The private key in cryptocurrency wallets is used for:

• Receiving funds

• Authorizing transactions

• Mining new coins

• Viewing transaction history

Which cryptocurrency introduced smart contracts?

• Bitcoin

• Ethereum

• Litecoin

• Ripple

In blockchain, an ICO stands for:

• Internal Coin Operation

• Initial Crypto Offering

• Initial Coin Offering

• International Crypto Organization

Which is a **privacy coin**?

• Ethereum

• Monero

• Dogecoin

• Litecoin