Data and Transaction Flow in Blockchain BDC Practice Questions (Page 6)

Questions 26–30

1. 26foundation · easy

   What is the primary role of the mempool in a blockchain node?

   • ATo hold pending transactions that have been validated but not yet included in a block
   • BTo archive old blocks for long-term storage
   • CTo store the private keys of users
   • DTo store confirmed transactions that are part of the blockchain
   Reveal Solution Discussion Select an answer first
2. 27foundation · easy

   How does a Merkle tree contribute to blockchain data integrity?

   • AIt allows efficient verification that a transaction is included in a block without downloading all transactions
   • BIt stores the full transaction data in the block header
   • CIt encrypts each transaction individually
   • DIt links the block to the previous block
   Reveal Solution Discussion Select an answer first
4. 28foundation · easy

   How does a miner typically prioritize transactions from the mempool when constructing a new block?

   • ABy the transaction fee, with higher fees typically selected first
   • BBy the transaction's size, with smaller transactions first
   • CBy the sender's reputation, with trusted senders first
   • DBy the transaction's timestamp, with older transactions first
   Reveal Solution Discussion Select an answer first
5. 29foundation · easy

   What is the primary function of a hash pointer in a blockchain?

   • ATo point to the previous block's data and verify its integrity
   • BTo store the timestamp of the block
   • CTo encrypt the transactions in the block
   • DTo store the private key of the block creator
   Reveal Solution Discussion Select an answer first
6. 30foundation · easy

   Which component of a blockchain transaction contains the recipient's address and the amount being transferred?

   • AMetadata
   • BOutput
   • CSignature
   • DInput
   Reveal Solution Discussion Select an answer first