101Blockchain.net - Interactive Blockchain Learning

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Test your understanding of block structure and mining

All Quizzes Start Lesson

Question 1

What are the main components of a blockchain block?

Only transaction data Block number, nonce, data, previous hash, and hash Just the hash and previous hash Timestamp and data only

Question 2

What is the purpose of the timestamp in a block?

To encrypt the data To record when the block was created To determine the block size To calculate transaction fees

Question 3

What is mining in the context of blockchain?

Extracting cryptocurrency from blocks Finding a nonce that produces a valid block hash Downloading the blockchain Creating new transactions

Question 4

Why does increasing the number of required leading zeros make mining harder?

It makes the hash longer It reduces the probability of finding a valid hash It increases the block size It slows down the hash function

Question 5

What happens when a block is successfully mined?

It is immediately deleted It is added to the blockchain It is encrypted It is sent to a central server

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