Ethereum's Transactions, Validation, and Upgrades BDC Practice Questions (Page 8)

Questions 36–40

1. 36foundation · easy

   Which upgrade was the first to be implemented on the Ethereum mainnet after the Frontier release?

   • AHomestead
   • BLondon
   • CByzantium
   • DConstantinople
   Reveal Solution Discussion Select an answer first
2. 37expert · medium

   A developer is evaluating the impact of EIP-1559 on their application. Which of the following is a direct consequence of the London upgrade?

   • AThe gas limit for blocks is now fixed and cannot change.
   • BUsers can set a gas price of zero and still have their transactions included.
   • CMiners receive the entire transaction fee, including the base fee.
   • DThe base fee is burned, reducing the total supply of ETH.
   Reveal Solution Discussion Select an answer first
4. 38foundation · easy

   What is the primary purpose of the nonce in an Ethereum transaction?

   • ATo determine the gas price for the transaction
   • BTo prevent double-spending and ensure transaction ordering
   • CTo identify the recipient of the transaction
   • DTo increase the security of the signature
   Reveal Solution Discussion Select an answer first
5. 39foundation · easy

   Under EIP-1559, what happens to the base fee of a block?

   • AIt is added to the next block's base fee
   • BIt is given to the miner
   • CIt is returned to the sender
   • DIt is burned
   Reveal Solution Discussion Select an answer first
6. 40foundation · easy

   Which of the following is NOT a typical step in validating a new block?

   • ADecrypting the block's transactions to verify their contents
   • BChecking that the block's timestamp is in the future
   • CExecuting all transactions in the block and checking state transitions
   • DVerifying the block header's previous hash
   Reveal Solution Discussion Select an answer first