Practice Test Geeks(CCE) Certified Cryptocurrency Expert Practice Test
← All CCE Flashcard Decks

Blockchain Fundamentals Flashcards

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

Read the first 7 Blockchain Fundamentals flashcards as text

  1. What does 'immutability' mean in the context of blockchain?

    Answer: Once data is recorded on-chain, it cannot be altered without redoing all subsequent work

    Blockchain immutability means historical records are cryptographically locked; changing one entry would require recalculating all subsequent blocks.

  2. What is a 'light client' (SPV node) in a blockchain network?

    Answer: A node that downloads only block headers to verify payments without full validation

    SPV (Simplified Payment Verification) clients download only block headers and use Merkle proofs to verify transactions without storing the full chain.

  3. What distinguishes a public blockchain from a consortium blockchain?

    Answer: Public blockchains are open to anyone; consortium blockchains are governed by a group of organizations

    A consortium blockchain is controlled by a pre-selected group of organizations, while a public blockchain allows open participation from anyone.

  4. In blockchain systems, what is meant by 'throughput'?

    Answer: The number of transactions a network can process per unit of time

    Throughput, often measured in transactions per second (TPS), quantifies how much transaction volume a blockchain network can handle.

  5. What is a 'sidechain' in blockchain architecture?

    Answer: A separate blockchain that runs in parallel and is pegged to a main chain

    A sidechain is an independent blockchain linked to a parent chain via a two-way peg, enabling asset transfers and experimental features without risking the main chain.

  6. What is the double-spending problem that blockchain technology solves?

    Answer: The ability of a digital asset owner to spend the same coins more than once

    Digital files can be copied freely, so without blockchain consensus, a user could broadcast the same digital coin to multiple recipients; the chain enforces a single valid spending order.

  7. What happens during a blockchain 'reorganization' (reorg)?

    Answer: The network switches to a longer competing chain, orphaning recently confirmed blocks

    A reorg occurs when a longer fork overtakes the current chain tip, causing nodes to roll back recent blocks and adopt the new heavier chain.