C4 Cheat Sheet 2026

The 30 highest-yield C4 facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. A C4-certified professional disagrees with a regulation they believe is misguided. The ethical approach is to: → Comply while advocating for change through legal and professional channels
2. Which behavior BEST demonstrates adherence to professional competence standards when new cryptocurrency regulations are enacted? → Promptly updating professional knowledge and adjusting client guidance accordingly
3. What is 'slippage' in cryptocurrency trading and which risk category does it fall under? → The difference between expected and executed trade price — market risk
4. Under MiCA (Markets in Crypto-Assets Regulation), which entity type must obtain a specific authorization before offering crypto-asset services in the EU? → Crypto-Asset Service Providers (CASPs)
5. What happens if a user loses their private key in cryptocurrency? → Assets become permanently inaccessible
6. What is the primary purpose of a blockchain transaction's on-chain audit trail in a compliance investigation? → To provide immutable, timestamped records of fund flows
7. What is the recommended frequency for reviewing and updating blockchain technology protocols? → Monitoring outcomes through regular data collection and trend analysis
8. What ensures immutability in a blockchain? → Cryptographic hashing and consensus
9. What is the main risk associated with using a brain wallet (a wallet whose private key is derived from a memorized passphrase)? → Human-chosen passphrases have low entropy and are vulnerable to dictionary attacks
10. Which element is most critical when drafting a tokenomics announcement for diverse global stakeholders? → Clearly explaining token utility, distribution schedule, and vesting terms
11. Which document outlines an organization's procedures for recovering cryptocurrency operations after a major security incident? → Business Continuity Plan (BCP)
12. What does the term 'decentralized' mean in cryptocurrency? → Distributed across multiple participants
13. What is the role of a community moderator in a cryptocurrency project's stakeholder engagement strategy? → Filtering, responding to, and escalating community concerns to the core team
14. Which risk is introduced when a blockchain undergoes a hard fork and the original chain continues alongside the new chain? → Replay attack risk
15. What is the recommended frequency for reviewing and updating regulations, compliance & security protocols? → Monitoring outcomes through regular data collection and trend analysis
16. A stakeholder questions the value of risk management & mitigation initiatives. Which response best demonstrates ROI? → Building a culture of accountability with transparent reporting
17. What is a cryptocurrency wallet primarily used for? → To store and manage digital assets
18. Which tool or methodology is most appropriate for analyzing blockchain technology outcomes? → Maintaining professional boundaries while building collaborative relationships
19. A crypto firm uses an insurance policy that covers losses from hot wallet hacks. Which risk management strategy does this represent? → Risk transfer
20. Which key management practice does C4 recommend for long-term storage of significant cryptocurrency holdings? → Using a reputable hardware wallet with an offline, encrypted backup of the seed phrase
21. In the context of crypto compliance, what is 'chain-hopping' and why does it complicate AML investigations? → Converting assets across multiple blockchains to obscure fund origins
22. Which of the following best describes Bitcoin? → A decentralized cryptocurrency
23. What type of cryptography is used to secure cryptocurrency transactions? → Asymmetric cryptography
24. A DeFi protocol wants to communicate a governance proposal to retail token holders. Which channel is most appropriate? → An on-chain governance forum with a public snapshot vote
25. Which best practice should a crypto project follow when translating communications for non-English speaking communities? → Engage native speakers to culturally adapt content, not just translate word-for-word
26. Why is regulatory compliance important for crypto businesses? → To operate legally and gain trust
27. Which consensus mechanism did Ethereum adopt following 'The Merge' in September 2022? → Proof of Stake (PoS)
28. What is one common method to secure a cryptocurrency wallet? → Two-factor authentication
29. What does AML stand for in cryptocurrency compliance? → Anti-Money Laundering
30. What is a 'block reward halving' in Bitcoin? → When the newly created Bitcoin awarded per block is reduced by 50%