A blockchain developer is advising a company on how to prepare for an upcoming Ethereum hard fork that introduces a new EIP changing the opcode gas costs. The company runs a full node and a backend service that submits transactions. What is the most critical action to take before the fork activates?

Update the node software to a version that supports the new EIP and ensure the backend service adjusts gas limits accordingly.

Stop all transaction submission until the fork is complete.

Migrate all smart contracts to a new address to avoid compatibility issues.

Increase the gas price on all transactions to ensure they are included after the fork.

A developer is building a service that sends multiple transactions from the same account. They need to ensure transactions are processed in the correct order. What should they do?

Use the same nonce for all transactions and rely on gas price to determine order.

Increment the nonce by 1 for each transaction and submit them in sequence.

Set the nonce to the current block number for each transaction.

Use a random nonce for each transaction to avoid collisions.

What is the purpose of the priority fee (tip) in an EIP-1559 transaction?

To increase the transaction's nonce

To cover the cost of the base fee

To incentivize miners to include the transaction in a block

To fund the Ethereum Foundation

EC-CouncilBlockchain Developer Certification

Domain 5Objective 3

Ethereum's Transactions, Validation, and Upgrades BDC Practice Questions (Page 1)

Part of the Ethereum and Smart Contract Development domain, which makes up ~11% of our current practice bank.

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Questions 1–5

1expert · medium
A blockchain developer is advising a company on how to prepare for an upcoming Ethereum hard fork that introduces a new EIP changing the opcode gas costs. The company runs a full node and a backend service that submits transactions. What is the most critical action to take before the fork activates?
Select an answer first
2foundation · easy
Which field in an Ethereum transaction is used to prevent replay of the same transaction on the network?
Select an answer first
3application · medium
A developer is building a service that sends multiple transactions from the same account. They need to ensure transactions are processed in the correct order. What should they do?
Select an answer first
4foundation · easy
What is the purpose of the priority fee (tip) in an EIP-1559 transaction?
Select an answer first
5foundation · easy
Which validation check ensures that a transaction's nonce matches the sender's current transaction count?
Select an answer first

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Ethereum's Transactions, Validation, and Upgrades BDC Practice Questions (Page 1)

Questions 1–5

Which field in an Ethereum transaction is used to prevent replay of the same transaction on the network?

A developer is building a service that sends multiple transactions from the same account. They need to ensure transactions are processed in the correct order. What should they do?

What is the purpose of the priority fee (tip) in an EIP-1559 transaction?

Which validation check ensures that a transaction's nonce matches the sender's current transaction count?

Keep studying — Ethereum and Smart Contract Development