Practice Test Geeks(CBP) Certified Bitcoin Professional Practice Test
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Forks and Network Upgrades Flashcards

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  1. What key technical difference between Bitcoin SV and Bitcoin Cash led to their chain split in November 2018?

    Answer: Bitcoin SV sought to massively increase block size and restore original Satoshi opcodes, conflicting with BCH's development roadmap

    The BSV camp led by Craig Wright and Calvin Ayre pushed for 128MB+ blocks and opcode restoration, which clashed with the BCH developer group.

  2. How does Taproot (BIP 340/341/342) improve upon previous Bitcoin script upgrades?

    Answer: It makes complex multi-signature and smart contract transactions appear identical to simple transactions on-chain, improving privacy and efficiency

    Taproot uses Schnorr signatures and MAST to make multi-sig and scripted spends indistinguishable from single-key spends, enhancing privacy and reducing fees.

  3. What is the significance of the 'lock-in' period in BIP 9 soft fork deployment?

    Answer: Once signaling threshold is met, nodes have a final period to upgrade before the new rules activate

    After a signaling threshold is met in a BIP 9 retarget period, there is a lock-in window giving node operators time to update before mandatory enforcement.

  4. Which statement correctly describes the relationship between SegWit and the block size increase?

    Answer: SegWit introduced a block weight metric allowing effective capacity up to ~4MB while keeping the 1MB base block size limit

    SegWit changed the measurement from block size to block weight, with a 4M weight unit limit, enabling blocks larger than 1MB in practice.

  5. A miner produces a block signaling support for a soft fork but does not actually enforce the new rules. What is this behavior called?

    Answer: Spy mining or false signaling

    Spy mining or false signaling occurs when miners signal readiness for a fork without enforcing the new consensus rules, which can distort activation metrics.

  6. What role did the New York Agreement (NYA) of 2017 play in Bitcoin's scaling debate?

    Answer: It was an industry agreement among businesses and miners to activate SegWit and later hard fork to 2MB blocks

    The NYA was a private agreement signed by major Bitcoin companies and mining pools committing to SegWit activation followed by a 2MB block hard fork (SegWit2x).

  7. After a contentious hard fork, how is the 'canonical' or 'true' Bitcoin chain typically determined by the market?

    Answer: Whichever chain retains the ticker symbol BTC and commands the highest market valuation

    Market price and exchange ticker assignment are the de facto arbiters — the chain the market values most as 'Bitcoin' retains the BTC ticker and dominance.