Practice Test Geeks(CBSA) Certified Blockchain Solution Architect Practice Test
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Blockchain Scalability & Performance Flashcards

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  1. What does 'latency' measure in blockchain performance metrics?

    Answer: The time delay between when a transaction is submitted and when it receives on-chain confirmation

    Latency in blockchain refers to the end-to-end time from broadcasting a transaction to receiving a confirmation, directly impacting user experience.

  2. Which off-chain data storage solution is most commonly paired with blockchains to handle large files while keeping storage costs low?

    Answer: IPFS (InterPlanetary File System)

    IPFS is a decentralized, content-addressed storage network where only the hash of data is stored on-chain, making it the standard off-chain storage companion for blockchain applications.

  3. What is the defining architectural characteristic of a 'sidechain'?

    Answer: It is an independent blockchain running parallel to the main chain with its own consensus, connected via a two-way peg

    A sidechain is a separate blockchain with its own consensus rules, connected to the main chain through a two-way peg that allows assets to move between them.

  4. What does Ethereum's full 'danksharding' proposal aim to achieve?

    Answer: Provide massively increased data availability for rollups through full sharding with data availability sampling

    Danksharding uses data availability sampling across a large number of shards to provide enormous throughput for rollup data, making Layer 2 fees negligible.

  5. How does the CAP theorem apply to blockchain system design?

    Answer: It establishes that distributed systems like blockchains can reliably guarantee only two of three properties: Consistency, Availability, and Partition tolerance

    The CAP theorem, applicable to all distributed systems including blockchains, states that during a network partition, a system must choose between consistency and availability.

  6. What problem does 'data availability sampling (DAS)' solve in blockchain scalability?

    Answer: It enables light nodes to verify that full block data is available by randomly sampling small data chunks without downloading the entire block

    Data availability sampling allows lightweight clients to gain high statistical confidence that block data was fully published by checking a random sample of small data pieces.

  7. Which statement best describes Ethereum's 'rollup-centric roadmap' for long-term scalability?

    Answer: Layer 2 rollups serve as the primary execution layer while Ethereum Layer 1 acts as a secure settlement and data availability layer

    Ethereum's rollup-centric roadmap delegates execution to Layer 2 rollups for scale while keeping Layer 1 as the trust anchor for security, settlement, and data availability.