A developer is deciding whether to deploy a smart contract on Ethereum mainnet or on a sidechain. The DApp requires low latency and low cost, but the team is concerned about security. Which statement accurately describes the trade-off?

Sidechains inherit Ethereum's security because they use the same consensus mechanism.

Sidechains offer lower latency and cost but have their own security model, which may be weaker than Ethereum mainnet's.

Sidechains are not compatible with Ethereum smart contracts.

Ethereum mainnet offers lower latency and cost than sidechains.

A company wants to create a decentralized marketplace where buyers and sellers can transact directly without a central intermediary. They want to use Ethereum. Which feature of Ethereum makes this possible?

A private database that only authorized users can access

A built-in centralized order book

A native token that can only be used for governance

Smart contracts that execute transactions automatically when conditions are met

A developer is reading about Ethereum's history and encounters the term 'The Merge.' What did 'The Merge' refer to in Ethereum's evolution?

The integration of smart contracts into the EVM

The merger of Ethereum and Bitcoin networks

The unification of testnets into a single network

The combination of the execution layer and the consensus layer

A blockchain developer is reviewing Ethereum's history to understand how the network evolved. Which sequence correctly represents the major milestones in Ethereum's evolution?

Serenity → Metropolis → Homestead → Frontier

Metropolis → Serenity → Frontier → Homestead

Frontier → Homestead → Metropolis → Serenity

Homestead → Frontier → Serenity → Metropolis

EC-CouncilBlockchain Developer Certification

Domain 5Objective 1

Ethereum's Purpose, Ecosystem, and Evolution BDC Practice Questions (Page 7)

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

42questions here

9free pages

3concepts

Questions 31–35

31expert · hard
A developer is deciding whether to deploy a smart contract on Ethereum mainnet or on a sidechain. The DApp requires low latency and low cost, but the team is concerned about security. Which statement accurately describes the trade-off?
Select an answer first
32application · medium
A company wants to create a decentralized marketplace where buyers and sellers can transact directly without a central intermediary. They want to use Ethereum. Which feature of Ethereum makes this possible?
Select an answer first
33application · medium
A developer is reading about Ethereum's history and encounters the term 'The Merge.' What did 'The Merge' refer to in Ethereum's evolution?
Select an answer first
34foundation · easy
Which of the following is an Ethereum development tool used to compile and test smart contracts locally?
Select an answer first
35application · medium
A blockchain developer is reviewing Ethereum's history to understand how the network evolved. Which sequence correctly represents the major milestones in Ethereum's evolution?
Select an answer first

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