101Blockchain.net - Interactive Blockchain Learning

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Evaluate your knowledge of Bitcoin block structure and mining

All Quizzes Start Lesson

Question 1

What is in a Bitcoin block header?

Only the transactions Version, previous block hash, Merkle root, timestamp, difficulty, and nonce Just the block number Miner's address only

Question 2

What is the Merkle root in a Bitcoin block header?

The hash of the first transaction A single hash representing all transactions in the block The miner's address The previous block's hash

Question 3

What is Bitcoin's target block time?

1 minute 10 minutes 1 hour Variable

Question 4

How often does Bitcoin adjust its mining difficulty?

Every block Every 2016 blocks (approximately 2 weeks) Every day Never

Question 5

What is the coinbase transaction?

A transaction from Coinbase exchange The first transaction in a block that rewards the miner A transaction with high fees A cancelled transaction

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