What was the first ever cryptocurrency?

Who executes the smart contracts?

Who created Bitcoin?

What is the size, in characters, of an IPFS file hash using Base58 encoding?

What type of blockchain is Bitcoin based on?

How is the placeholder for a function modifier indicated in the modified function definition?

What are the components of a block in Blockchain Technology?

What does 'double spending' mean in the context of the Double Spending Problem?

What is Solidity?

What is the Minimum Relay Fee?