A user sends a cryptocurrency transaction. The transaction is broadcast and picked up by a miner. After the miner includes it in a block, what must happen for the transaction to be considered confirmed?

The transaction must be broadcast a second time to ensure all nodes receive it.

The block must be accepted by the network's consensus mechanism and added to the chain.

The transaction must be included in the next block after the one created by the miner.

The miner must send a confirmation receipt to the user.

How is a smart contract executed on a blockchain?

By all nodes in the network independently, producing the same result

By a central server that runs the contract code

By a random node selected by the network

How does the blockchain architecture provide security against tampering?

By storing data on a single, highly protected server

By using cryptographic hashes that make any alteration detectable

By requiring all users to use two-factor authentication

By keeping the ledger private and accessible only to the network administrator

In a blockchain network, what is the role of a node?

To create and sign transactions on behalf of users

To act as a central authority that approves all transactions

To store the private keys of all network participants

To maintain a copy of the distributed ledger and participate in network operations

EC-CouncilBlockchain Business Leader Certification

Domain 1Objective 2

Blockchain Architecture and Its Core Components BBLC Practice Questions (Page 8)

Part of the Blockchain Fundamentals for Business domain, which makes up ~11% of our current practice bank.

52questions here

11free pages

10concepts

Questions 36–40

36application · medium
A user sends a cryptocurrency transaction. The transaction is broadcast and picked up by a miner. After the miner includes it in a block, what must happen for the transaction to be considered confirmed?
Select an answer first
37foundation · easy
How is a smart contract executed on a blockchain?
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38foundation · easy
How does the blockchain architecture provide security against tampering?
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39foundation · easy
Which of the following is a common type of consensus mechanism used in blockchain networks?
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40foundation · easy
In a blockchain network, what is the role of a node?
Select an answer first

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