Bitcoin Blockchain Architecture and Network Transactions BFC Practice Questions (Page 5)

Questions 21–25

1. 21foundation · easy

   Why do miners typically prioritize transactions with higher fees?

   • ABecause higher-fee transactions are required to be processed first by the protocol.
   • BBecause higher-fee transactions are more secure.
   • CBecause miners earn the fees as part of their reward for mining a block.
   • DBecause higher-fee transactions are smaller in size.
   Reveal Solution Discussion Select an answer first
2. 22expert · hard

   A bitcoin user broadcasts a transaction with a fee rate of 5 sat/vB. The transaction is not confirmed for several hours. They want to speed it up without waiting. Which option is most likely to work?

   • AWait for the network to clear, as there is no way to speed up a transaction.
   • BAsk a miner to include the transaction manually.
   • CUse the Replace-By-Fee (RBF) feature to broadcast a new transaction with a higher fee that spends the same inputs.
   • DBroadcast the same transaction again with a higher fee.
   Reveal Solution Discussion Select an answer first
4. 23application · medium

   A user's bitcoin transaction has been broadcast but is not yet confirmed. They want to know why it is taking longer than expected. Which factor most directly affects how quickly a transaction is confirmed?

   • AThe number of confirmations the transaction already has.
   • BThe age of the bitcoin address used in the transaction.
   • CThe transaction's fee rate relative to other transactions in the mempool.
   • DThe total value of the transaction in bitcoins.
   Reveal Solution Discussion Select an answer first
5. 24application · medium

   A company wants to validate incoming Bitcoin payments without downloading the entire blockchain. Which node type should they run?

   • AAn archive node that stores the entire history of the blockchain.
   • BA mining node that only validates transactions it includes in blocks.
   • CA lightweight (SPV) node that verifies transactions using block headers and Merkle proofs.
   • DA full node that downloads and validates every block and transaction.
   Reveal Solution Discussion Select an answer first
6. 25foundation · easy

   What is a key characteristic of a soft fork?

   • AIt only changes the transaction fee structure.
   • BIt requires all nodes to upgrade to the new rules or they will be unable to participate.
   • CIt is backward-compatible, meaning old nodes still accept new blocks as valid.
   • DIt always results in a new cryptocurrency.
   Reveal Solution Discussion Select an answer first