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

7 cards from real CBSA 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 Scalability & Performance flashcards as text

  1. What is the primary purpose of a Layer 2 scaling solution in blockchain?

    Answer: To process transactions off the main chain while inheriting its security

    Layer 2 solutions process transactions off the main blockchain (Layer 1) while leveraging its security and settlement guarantees.

  2. Which scaling technique divides a blockchain network into smaller groups of nodes, each responsible for processing a subset of transactions?

    Answer: Sharding

    Sharding splits the network into parallel partitions called shards, each handling a portion of the transaction load to increase overall throughput.

  3. What is a 'state channel' in the context of blockchain scaling?

    Answer: An off-chain communication channel where participants exchange signed transactions privately and settle on-chain only at the end

    State channels allow participants to conduct many transactions off-chain and only broadcast the final settled state to the main blockchain.

  4. Bitcoin's Lightning Network is an example of which Layer 2 scaling category?

    Answer: Payment/State channel network

    The Lightning Network is a payment channel network built on Bitcoin, enabling fast and cheap off-chain transactions settled bilaterally.

  5. Which metric is most commonly used to measure and compare blockchain transaction throughput?

    Answer: Transactions per second (TPS)

    Transactions per second (TPS) directly measures how many transactions a network can confirm per second, making it the standard throughput benchmark.

  6. What is an 'Optimistic Rollup' in Layer 2 blockchain scaling?

    Answer: A Layer 2 solution that batches off-chain transactions and assumes their validity, relying on fraud proofs during a challenge window

    Optimistic Rollups assume transactions are valid by default and allow a challenge period during which verifiers can submit fraud proofs to dispute invalid state transitions.

  7. What does the 'blockchain trilemma' (as described by Vitalik Buterin) refer to?

    Answer: The inherent difficulty of simultaneously achieving decentralization, security, and scalability in a blockchain

    The blockchain trilemma states that achieving decentralization, security, and scalability all at once is extremely difficult, and improving one typically comes at the expense of another.