Blockchain Scaling Solutions BDC Practice Questions (Page 3)

Questions 11–15

1. 11foundation · easy

   What is the primary goal of consensus protocol improvements as a Layer 1 scaling solution?

   • ATo create child chains that settle on the main chain
   • BTo move transactions off the main chain
   • CTo increase the number of transactions per second by making consensus faster
   • DTo use zero-knowledge proofs for transaction validation
   Reveal Solution Discussion Select an answer first
2. 12expert · hard

   A team must choose between sharding and a rollup for a public blockchain. The application requires strong security guarantees and the team is concerned about the risk of a single shard being compromised. The rollup would inherit the main chain's security. Which solution offers stronger security guarantees, and what is the trade-off?

   • ARollup, because it inherits the main chain's security, but it may have higher on-chain data costs.
   • BSharding, because it does not require any additional trust assumptions.
   • CRollup, because it eliminates all on-chain data costs.
   • DSharding, because it provides stronger security by isolating shards from each other.
   Reveal Solution Discussion Select an answer first
4. 13foundation · easy

   Which of the following is a fundamental limitation of blockchain networks that scaling solutions aim to address?

   • AThe inability to use cryptographic hashing for transaction integrity
   • BThe need for a central authority to resolve double-spending
   • CThe requirement that every full node processes and stores every transaction
   • DThe lack of a built-in scripting language for smart contracts
   Reveal Solution Discussion Select an answer first
5. 14application · medium

   A blockchain network is experiencing throughput bottlenecks because every node must validate every transaction. The development team wants to increase parallelism while keeping the network as a single, unified blockchain. Which approach should they adopt?

   • AImplement sharding to divide the network into partitions that process transactions in parallel.
   • BAdopt a sidechain architecture for each application.
   • CMove all transactions to a network of state channels.
   • DIncrease the block gas limit to fit more transactions per block.
   Reveal Solution Discussion Select an answer first
6. 15foundation · easy

   What is Plasma in the context of blockchain scaling?

   • AA protocol for off-chain payment channels
   • BA type of zero-knowledge proof used for privacy
   • CA framework for creating child chains that periodically commit to the main chain
   • DA consensus algorithm that uses proof-of-stake
   Reveal Solution Discussion Select an answer first