Blockchain Scaling Solutions BDC Practice Questions (Page 2)

Questions 6–10

1. 6foundation · easy

   What is the primary benefit of state channels?

   • AThey allow many transactions to occur off-chain with only final settlement on-chain
   • BThey provide a new consensus mechanism for the main chain
   • CThey increase the block size of the main chain
   • DThey allow anyone to join the channel without permission
   Reveal Solution Discussion Select an answer first
2. 7expert · hard

   A team must scale a payment network. They are considering state channels and a sidechain. The application has millions of users who transact with each other infrequently, and the team cannot enforce a requirement that users lock funds for long periods. Which solution is more appropriate, and why?

   • ASidechain, because it eliminates the need for a main chain entirely.
   • BState channels, because they provide the same scalability as a sidechain without additional consensus overhead.
   • CSidechain, because it supports many users without requiring them to lock funds in a channel.
   • DState channels, because they allow any user to transact with any other user without locking funds.
   Reveal Solution Discussion Select an answer first
4. 8application · medium

   A privacy-focused payment platform wants to scale transaction throughput while ensuring that transaction details are not visible on the main chain. They are willing to invest in significant off-chain computation to generate cryptographic proofs. Which scaling solution best aligns with these requirements?

   • AA sidechain that processes transactions and periodically commits a hash to the main chain.
   • BZK-rollup, which bundles transactions and submits a zero-knowledge proof that validates the batch without revealing transaction details.
   • COptimistic rollup, which assumes validity and uses fraud proofs for disputes.
   • DA state channel that settles only final balances on-chain.
   Reveal Solution Discussion Select an answer first
5. 9application · medium

   A team wants to build a scalable decentralized application by creating multiple child chains that each handle a subset of users, while relying on the main chain for security and dispute resolution. They want to use a framework that supports this hierarchical structure. Which approach should they use?

   • AA state channel network that allows off-chain transactions between users.
   • BAn optimistic rollup that batches transactions into a single on-chain contract.
   • CPlasma, which creates child chains that periodically commit state roots to the main chain and use fraud proofs for disputes.
   • DA single sidechain that processes all transactions and uses a two-way peg for asset transfers.
   Reveal Solution Discussion Select an answer first
6. 10foundation · easy

   What is the primary benefit of rollups?

   • AThey increase throughput by processing many transactions off-chain and posting a single batch on-chain
   • BThey eliminate the need for a main chain
   • CThey provide a new consensus algorithm for the main chain
   • DThey allow unlimited transaction size
   Reveal Solution Discussion Select an answer first