Mixed Deck — All C4 Topics Flashcards

Which global organization develops standards to combat money laundering in crypto?

Answer: FATF

The Financial Action Task Force (FATF) issues guidelines to help countries combat money laundering and terrorist financing involving cryptocurrencies.

What is the primary function of Proof of Work (PoW) in a blockchain network?

Answer: To require miners to solve computationally difficult puzzles to validate transactions

Proof of Work requires miners to expend computational energy solving cryptographic puzzles, which secures the network and validates transactions.

What is the risk of storing a seed phrase digitally in a photograph or note-taking app?

Answer: Cloud sync or app compromise can expose the seed phrase to attackers

Cloud-synced apps can be hacked or compromised, exposing the seed phrase and allowing an attacker to drain the wallet completely.

What happens if a user loses their private key in cryptocurrency?

Answer: Assets become permanently inaccessible

Losing the private key means losing access to the associated cryptocurrency, as there is no central recovery system in decentralized networks.

A stakeholder questions the value of communication & stakeholder engagement initiatives. Which response best demonstrates ROI?

Answer: Building a culture of accountability with transparent reporting

Building a culture of accountability with transparent reporting is the correct approach because effective communication & stakeholder engagement in the cryptocurrency certification consortium field requires adherence to professional standards, evidence-based practices, and systematic methodology. This approach ensures consistent, high-quality outcomes while maintaining professional accountability.

A new regulation impacts blockchain technology procedures. What should a C4 professional do first?

Answer: Ensuring compliance with current regulatory requirements and standards

Ensuring compliance with current regulatory requirements and standards is the correct approach because effective blockchain technology in the cryptocurrency certification consortium field requires adherence to professional standards, evidence-based practices, and systematic methodology. This approach ensures consistent, high-quality outcomes while maintaining professional accountability.

Which of the following is a key performance indicator for evaluating communication & stakeholder engagement effectiveness?

Answer: Prioritizing based on risk assessment and potential impact

Prioritizing based on risk assessment and potential impact is the correct approach because effective communication & stakeholder engagement in the cryptocurrency certification consortium field requires adherence to professional standards, evidence-based practices, and systematic methodology. This approach ensures consistent, high-quality outcomes while maintaining professional accountability.

What is a hierarchical deterministic (HD) wallet in the context of cryptocurrency?

Answer: A wallet that generates a tree of key pairs from a single seed phrase

An HD wallet uses a single seed phrase to deterministically generate a hierarchical tree of private/public key pairs, per BIP32.

Which consensus mechanism did Ethereum adopt following 'The Merge' in September 2022?

Answer: Proof of Stake (PoS)

Ethereum transitioned from Proof of Work to Proof of Stake in The Merge, dramatically reducing network energy consumption while maintaining security.

Which key management practice does C4 recommend for long-term storage of significant cryptocurrency holdings?

Answer: Using a reputable hardware wallet with an offline, encrypted backup of the seed phrase

C4 best practices recommend hardware wallets paired with secure, offline backups (e.g., metal seed plates) for long-term significant holdings.

Which of the following is a key performance indicator for evaluating risk management & mitigation effectiveness?

Answer: Prioritizing based on risk assessment and potential impact

Prioritizing based on risk assessment and potential impact is the correct approach because effective risk management & mitigation in the cryptocurrency certification consortium field requires adherence to professional standards, evidence-based practices, and systematic methodology. This approach ensures consistent, high-quality outcomes while maintaining professional accountability.

What is the most common mistake professionals make when implementing regulations, compliance & security strategies?

Answer: Developing contingency plans for high-probability risk scenarios

Developing contingency plans for high-probability risk scenarios is the correct approach because effective regulations, compliance & security in the cryptocurrency certification consortium field requires adherence to professional standards, evidence-based practices, and systematic methodology. This approach ensures consistent, high-quality outcomes while maintaining professional accountability.

What is the primary objective of quality assurance & compliance within the C4 professional framework?

Answer: Analyzing data systematically using validated assessment tools

Analyzing data systematically using validated assessment tools is the correct approach because effective quality assurance & compliance in the cryptocurrency certification consortium field requires adherence to professional standards, evidence-based practices, and systematic methodology. This approach ensures consistent, high-quality outcomes while maintaining professional accountability.

Which C4 principle applies when a cryptocurrency professional is advising a client on DeFi investments and must disclose risks such as smart contract vulnerabilities and impermanent loss?

Answer: Full disclosure and suitability — ensuring the client understands material risks before investing

C4's professional standards require practitioners to fully disclose material risks — including smart contract risk, impermanent loss, and protocol insolvency — to ensure client suitability.

Which scenario would require a cryptocurrency certification consortium professional to escalate a cryptocurrency basics concern?

Answer: Creating feedback mechanisms that encourage continuous improvement

Creating feedback mechanisms that encourage continuous improvement is the correct approach because effective cryptocurrency basics in the cryptocurrency certification consortium field requires adherence to professional standards, evidence-based practices, and systematic methodology. This approach ensures consistent, high-quality outcomes while maintaining professional accountability.

What is an oracle in the context of smart contracts?

Answer: A service that provides real-world external data (e.g., asset prices) to smart contracts that cannot access off-chain information directly

Oracles bridge the on-chain/off-chain gap by feeding external data (prices, weather, election results) into smart contracts, which are otherwise isolated from outside information.

Which characteristic of blockchain ensures transparency?

Answer: Distributed ledger

Blockchain's distributed ledger allows all participants to access and verify the same data, which fosters transparency.

What attack involves a malicious actor replacing a legitimate wallet address displayed in an application with their own address?

Answer: Address substitution / clipboard hijacking attack

Clipboard hijacking malware monitors the clipboard and silently replaces copied cryptocurrency addresses with the attacker's address.

During a communication & stakeholder engagement audit, which documentation is most critical to have readily available?

Answer: Conducting root cause analysis to identify underlying systemic issues

Conducting root cause analysis to identify underlying systemic issues is the correct approach because effective communication & stakeholder engagement in the cryptocurrency certification consortium field requires adherence to professional standards, evidence-based practices, and systematic methodology. This approach ensures consistent, high-quality outcomes while maintaining professional accountability.

What is a 'nonce' in the context of cryptocurrency mining?

Answer: A random number miners adjust to find a valid block hash

A nonce is an arbitrary number miners iterate through to find a hash output that meets the network's difficulty target, making each mining attempt unique.