Practice Test Geeks(C4) CryptoCurrency Certification Consortium Practice Test
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Blockchain Technology Flashcards

6 cards from real C4 practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 6 Blockchain Technology flashcards as text

  1. What is a block in the context of blockchain technology?

    Answer: A container for grouped transactions

    A block is a digital container that stores a group of transactions and is linked to previous blocks in the chain through cryptographic hashes.

  2. What ensures immutability in a blockchain?

    Answer: Cryptographic hashing and consensus

    Immutability is ensured through cryptographic hashing and the consensus mechanism, which makes altering past blocks nearly impossible.

  3. What role do nodes play in a blockchain network?

    Answer: They validate and store blockchain data

    Nodes are computers that participate in the blockchain network by validating and storing transactions and maintaining a copy of the distributed ledger.

  4. 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.

  5. What is the purpose of a consensus mechanism in blockchain?

    Answer: To validate transactions and state

    Consensus mechanisms help nodes in a decentralized network agree on the validity of transactions and the current state of the blockchain.

  6. Which technology allows smart contracts to operate on blockchain?

    Answer: Smart contract logic on blockchain

    Smart contracts are self-executing agreements written in code and hosted on blockchain platforms like Ethereum.

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Sources & references

Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy

  1. cryptoconsortium.org — Renewal, retake fee, retake policy, score release, eligibility, exam format, passing score, test dates, time limit, score validity · verified Oct 2026