Ethereum's Transactions, Validation, and Upgrades BDC Practice Questions (Page 5)

Questions 21–25

1. 21foundation · easy

   Which type of transaction is used to deploy a new smart contract to the Ethereum network?

   • ARegular transaction
   • BMeta transaction
   • CContract creation transaction
   • DInternal transaction
   Reveal Solution Discussion Select an answer first
2. 22application · medium

   A developer is building a wallet that needs to recover the sender's address from a signed transaction. What information is required to perform this recovery?

   • AThe sender's private key and the transaction hash.
   • BThe transaction hash and the sender's public key.
   • CThe transaction data (nonce, gas, to, value, data) and the signature components (r, s, v).
   • DThe recipient's address and the signature components (r, s, v).
   Reveal Solution Discussion Select an answer first
4. 23application · medium

   A user submits a transaction with a max fee per gas of 100 gwei and a priority fee of 2 gwei. The current base fee is 80 gwei. What is the maximum total fee the user will pay per gas unit?

   • A100 gwei
   • B102 gwei
   • C80 gwei
   • D82 gwei
   Reveal Solution Discussion Select an answer first
5. 24application · medium

   A developer is tracing a transaction from creation to inclusion. Which step occurs immediately after the transaction is signed?

   • AThe transaction is executed locally to verify its outcome.
   • BThe transaction is broadcast to the network and enters the mempool.
   • CThe transaction is sent to a mining pool for inclusion.
   • DThe transaction is stored in the sender's local database.
   Reveal Solution Discussion Select an answer first
6. 25foundation · easy

   What is the correct order of steps in the lifecycle of a typical Ethereum transaction?

   • ACreate → Sign → Broadcast → Mempool → Mine → Block inclusion
   • BCreate → Broadcast → Sign → Mine → Mempool → Block inclusion
   • CBroadcast → Create → Sign → Mine → Mempool → Block inclusion
   • DSign → Create → Mempool → Broadcast → Block inclusion → Mine
   Reveal Solution Discussion Select an answer first