Advanced Blockchain Concepts and Future Innovations in FinTech BFC Practice Questions (Page 5)

Questions 21–25

1. 21foundation · easy

   In a Proof of Stake (PoS) consensus mechanism, what determines a validator's chance of being selected to propose the next block?

   • AThe validator's geographic location and network latency
   • BThe amount of computational work the validator has performed
   • CThe validator's stake, often combined with randomization and other factors
   • DThe validator's reputation score from previous blocks
   Reveal Solution Discussion Select an answer first
2. 22expert · hard

   A fintech startup is tokenizing a portfolio of real estate assets. They want to allow investors to trade these tokens across multiple blockchain networks, but they must ensure that the tokenized assets are legally recognized in multiple jurisdictions. What is the most critical challenge they must address?

   • AImplementing a privacy layer to protect investor identities
   • BEnsuring cross-chain interoperability through bridges or atomic swaps
   • CSelecting a blockchain with high throughput to handle trading volume
   • DNavigating the varying securities laws and regulatory requirements in each jurisdiction
   Reveal Solution Discussion Select an answer first
4. 23application · medium

   A central bank is exploring the use of AI to monitor a proposed CBDC for suspicious transactions. They want to combine AI with blockchain technology. What is a key benefit of this integration?

   • AAI can replace the need for a blockchain ledger.
   • BAI can make the CBDC fully anonymous.
   • CAI can automatically execute transactions on behalf of users.
   • DAI can analyze on-chain data to detect patterns of money laundering more efficiently than manual review.
   Reveal Solution Discussion Select an answer first
5. 24expert · hard

   A consortium of 50 banks is building a permissioned blockchain for interbank settlements. They require high throughput, but also need to comply with a regulation that mandates all transactions be auditable by a central authority. They are considering DPoS. What is the main trade-off they must address?

   • ADPoS is more secure than PBFT but requires more validators, reducing throughput.
   • BDPoS is permissionless, which conflicts with the consortium's permissioned model.
   • CDPoS reduces energy consumption but may centralize block production among a few elected delegates, potentially conflicting with the need for equal auditability.
   • DDPoS provides immediate finality, which is required for settlements, but it requires a hard fork to implement.
   Reveal Solution Discussion Select an answer first
6. 25foundation · easy

   What is a zero-knowledge proof?

   • AA method to generate random numbers on a blockchain
   • BA consensus mechanism that requires validators to prove they hold a certain amount of tokens
   • CA cryptographic technique that allows one party to prove a statement is true without revealing any information beyond the statement's validity
   • DA method to encrypt data so that only the sender and receiver can read it
   Reveal Solution Discussion Select an answer first