A group of hospitals wants to share patient data on a blockchain. They need to comply with data privacy regulations that require the ability to delete personal data upon request. Which blockchain approach is most suitable?

Consortium blockchain with on-chain encryption

Public blockchain with immutable records

Public blockchain with zero-knowledge proofs

Private blockchain with off-chain storage for personal data

What is the primary function of a smart contract in a blockchain?

To store encrypted data off-chain.

To provide a user interface for interacting with the blockchain.

To automatically execute and enforce the terms of an agreement when predefined conditions are met.

To mine new blocks in a proof-of-work network.

A company is setting up a blockchain node for a public network. They want to ensure the node can serve transaction data to other nodes and participate in consensus, but they have limited disk space. They are considering running a pruned full node. What is the main limitation they should be aware of?

The node cannot connect to other nodes

The node cannot participate in consensus

The node cannot validate new transactions

The node cannot serve historical transaction data to other nodes

A developer is choosing a consensus mechanism for a new public blockchain that aims to be energy-efficient and allow anyone to participate in block production. They are comparing proof-of-stake (PoS) and delegated proof-of-stake (DPoS). Which consideration is most important in this decision?

DPoS is more energy-efficient than PoS

PoS allows any token holder to stake and participate, while DPoS requires voting for delegates, which can centralize power.

PoS requires specialized hardware, while DPoS does not

DPoS provides stronger finality than PoS

EC-CouncilBlockchain Developer Certification

Domain 1Objective 3

Blockchain Architecture, Node Infrastructure, and Types BDC Practice Questions (Page 6)

Part of the Blockchain Fundamentals and Architecture domain, which makes up ~14% of our current practice bank.

45questions here

9free pages

6concepts

Questions 26–30

26expert · hard
A group of hospitals wants to share patient data on a blockchain. They need to comply with data privacy regulations that require the ability to delete personal data upon request. Which blockchain approach is most suitable?
Select an answer first
27foundation · easy
What is the primary function of a smart contract in a blockchain?
Select an answer first
28expert · medium
A developer is building a DApp that needs to trigger a smart contract function when a real-world event occurs (e.g., a shipment arrives). The smart contract must receive the event data in a tamper-proof manner. Which component is required?
Select an answer first
29expert · hard
A company is setting up a blockchain node for a public network. They want to ensure the node can serve transaction data to other nodes and participate in consensus, but they have limited disk space. They are considering running a pruned full node. What is the main limitation they should be aware of?
Select an answer first
30expert · hard
A developer is choosing a consensus mechanism for a new public blockchain that aims to be energy-efficient and allow anyone to participate in block production. They are comparing proof-of-stake (PoS) and delegated proof-of-stake (DPoS). Which consideration is most important in this decision?
Select an answer first

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Blockchain Architecture, Node Infrastructure, and Types BDC Practice Questions (Page 6)

Questions 26–30

A group of hospitals wants to share patient data on a blockchain. They need to comply with data privacy regulations that require the ability to delete personal data upon request. Which blockchain approach is most suitable?

What is the primary function of a smart contract in a blockchain?

A developer is building a DApp that needs to trigger a smart contract function when a real-world event occurs (e.g., a shipment arrives). The smart contract must receive the event data in a tamper-proof manner. Which component is required?

A developer is choosing a consensus mechanism for a new public blockchain that aims to be energy-efficient and allow anyone to participate in block production. They are comparing proof-of-stake (PoS) and delegated proof-of-stake (DPoS). Which consideration is most important in this decision?

Keep studying — Blockchain Fundamentals and Architecture