Blockchain Scaling Solutions BDC Practice Questions (Page 7)

Questions 31–35

1. 31foundation · easy

   What is a key characteristic of a sidechain?

   • AIt has its own consensus mechanism and security model
   • BIt requires a hard fork of the main chain to operate
   • CIt processes transactions only on the main chain
   • DIt shares the exact same security as the main chain
   Reveal Solution Discussion Select an answer first
2. 32application · medium

   A consortium wants to run a high-throughput application with its own consensus rules and token, while still being able to move assets to and from a public blockchain. Which architecture best matches this requirement?

   • AA Plasma child chain that uses fraud proofs for withdrawals.
   • BA state channel network on top of the main chain.
   • CA ZK-rollup that posts validity proofs to the main chain.
   • DA sidechain with a two-way peg to the main chain.
   Reveal Solution Discussion Select an answer first
4. 33application · medium

   A DeFi protocol wants to reduce main-chain congestion by bundling hundreds of user transactions into a single on-chain transaction. The team is willing to accept a delay for dispute resolution and wants to minimize on-chain data. Which rollup design should they choose?

   • AZK-rollup with validity proofs.
   • BState channel with off-chain settlement.
   • CPlasma child chain with periodic commits.
   • DOptimistic rollup with fraud proofs.
   Reveal Solution Discussion Select an answer first
5. 34expert · hard

   A blockchain network wants to implement sharding but is concerned about cross-shard transaction complexity. Which approach best addresses this concern while maintaining the benefits of sharding?

   • AImplement a sidechain to handle all cross-shard transactions.
   • BDesign the application to minimize cross-shard transactions by grouping related data in the same shard.
   • CUse a single shard for all transactions to avoid cross-shard complexity.
   • DIncrease the block size on each shard to reduce the need for cross-shard transactions.
   Reveal Solution Discussion Select an answer first
6. 35foundation · easy

   How does a sidechain interact with the main blockchain?

   • AIt is a fork of the main chain that shares the same state
   • BIt relies on the main chain's consensus for every block
   • CIt uses a two-way peg to transfer assets between the chains
   • DIt sends every transaction to the main chain for validation
   Reveal Solution Discussion Select an answer first