Intermediate
Blockchain & Web3
Q53 / 100
What is an "oracle" in blockchain, and why is it needed?
Correct! Well done.
Incorrect.
The correct answer is A) A service that brings external, off-chain data (like price feeds) onto the blockchain so smart contracts can use it
A
Correct Answer
A service that brings external, off-chain data (like price feeds) onto the blockchain so smart contracts can use it
Explanation
Smart contracts cannot natively access data outside the blockchain; oracles (like Chainlink) fetch and deliver external data (prices, weather, events) on-chain in a verifiable way.
Progress
53/100