Bitcoin Network and Its Transactions BDC Practice Questions (Page 2)

Questions 6–10

1. 6foundation · easy

   After a Bitcoin transaction is broadcast, what happens before it is included in a block?

   • AIt is immediately considered final and irreversible
   • BIt is encrypted and stored in a private ledger
   • CIt is validated by nodes and propagated through the network
   • DIt is sent to a central clearinghouse for approval
   Reveal Solution Discussion Select an answer first
2. 7foundation · easy

   What is the first step in the lifecycle of a Bitcoin transaction?

   • AThe sender constructs the transaction and signs it with their private key
   • BThe recipient confirms receipt of the funds
   • CThe transaction is included in a block by a miner
   • DThe transaction is broadcast to the network
   Reveal Solution Discussion Select an answer first
4. 8application · medium

   A user broadcasts a Bitcoin transaction with a fee of 10 sat/vB. The network is congested and the mempool is full of transactions with fees above 20 sat/vB. What is the most likely outcome for this transaction?

   • AIt will be rejected immediately because the fee is below the mempool minimum.
   • BIt will be replaced by a higher-fee transaction automatically.
   • CIt will be included in the next block because the fee is above the minimum relay fee.
   • DIt will remain in the mempool until a miner includes it, possibly after higher-fee transactions.
   Reveal Solution Discussion Select an answer first
5. 9application · medium

   A user wants to ensure their Bitcoin transaction is confirmed within the next few blocks. The network is congested. What should the user do?

   • ASet a fee equal to the minimum relay fee to save money.
   • BSet a fee that is higher than the current median fee in the mempool.
   • CUse a smaller transaction size to reduce the absolute fee.
   • DBroadcast the transaction multiple times to increase its priority.
   Reveal Solution Discussion Select an answer first
6. 10expert · hard

   A company wants to run a Bitcoin node that participates in the network but does not store the entire blockchain. They want to validate transactions without downloading all historical blocks. What type of node should they run?

   • AA lightweight (SPV) node that only downloads block headers.
   • BA node that connects to a trusted third-party API for validation.
   • CA full node with pruning enabled.
   • DA mining node that only validates blocks it mines.
   Reveal Solution Discussion Select an answer first