Innovations in Blockchain Architecture and Smart Contract Platforms BBLC Practice Questions (Page 3)

Questions 11–15

1. 11application · medium

   A financial institution is evaluating smart contract platforms for a tokenization project. They require private transactions among a known set of participants, but also want to use existing Ethereum developer tools and skills. Which platform approach best fits?

   • AA permissioned Ethereum-compatible platform with private transactions
   • BA public Ethereum mainnet with all transactions visible
   • CA custom smart contract platform built from scratch
   • DA sidechain with public validators
   Reveal Solution Discussion Select an answer first
2. 12expert · hard

   A company is choosing between two smart contract platforms: Platform A uses a proof-of-authority consensus with a small set of known validators and has a rich developer toolset. Platform B uses a proof-of-stake consensus with a large validator set and has a smaller developer ecosystem. The company needs high throughput and strong developer productivity, but also values decentralization. Which platform should they choose?

   • APlatform A, because proof-of-authority is more secure than proof-of-stake
   • BPlatform B, because proof-of-stake is always faster than proof-of-authority
   • CPlatform A, because high throughput and developer tooling are more important than decentralization
   • DPlatform B, because decentralization is more important than throughput and developer tooling
   Reveal Solution Discussion Select an answer first
4. 13expert · hard

   A decentralized finance (DeFi) protocol is experiencing network congestion and high gas fees on a public blockchain. The team wants to reduce costs for users without sacrificing security or decentralization. They are considering a sidechain with a trusted validator set, a rollup that posts data to the main chain, and a state channel for micropayments. Which option best balances cost reduction and security?

   • AA rollup that posts data to the main chain
   • BA sidechain with a trusted validator set
   • CMoving to a permissioned blockchain
   • DA state channel for all transactions
   Reveal Solution Discussion Select an answer first
5. 14expert · hard

   A consortium of energy companies wants to use blockchain for peer-to-peer energy trading. They need to handle a high volume of small transactions, but they also need to ensure that the network remains secure against a malicious participant. Which architecture best balances scalability and security?

   • AA sharded public blockchain with a BFT consensus and a layer-2 payment channel
   • BA non-sharded public blockchain with Proof-of-Work
   • CA sharded private blockchain with a small validator set and no layer-2
   • DA private blockchain with Raft consensus and no layer-2
   Reveal Solution Discussion Select an answer first
6. 15application · medium

   A multinational enterprise wants to deploy a blockchain for internal audit trails. They need to ensure that only authorized employees can access the data, and they want to minimize the risk of data exposure to unauthorized parties. Which governance model is most appropriate?

   • AA public blockchain with encrypted data
   • BA private blockchain with membership-based access control
   • CA public blockchain with open access
   • DA consortium blockchain with public read access
   Reveal Solution Discussion Select an answer first