Web 3.0 Ecosystem and Components BDC Practice Questions (Page 5)

Questions 21–25

1. 21expert · hard

   A team is building a dApp that stores large media files. They want to use IPFS for content addressing and Filecoin for persistence. They also need to ensure that the dApp can retrieve the files quickly for users. The team is considering using a public IPFS gateway for retrieval. What is the main trade-off they should consider?

   • APublic gateways provide faster retrieval than running a local IPFS node, with no downsides.
   • BPublic gateways require users to pay a fee for every retrieval, making the dApp costly.
   • CPublic gateways automatically pin all content, so Filecoin is unnecessary.
   • DPublic gateways may be rate-limited or unavailable, creating a central point of failure for retrieval.
   Reveal Solution Discussion Select an answer first
2. 22expert · hard

   A developer is designing a DAO that manages a shared treasury. They want to ensure that no single party can unilaterally move funds, but they also want to avoid requiring a full vote for every small expense. Which governance design best balances security and operational efficiency?

   • ARequire a token vote for every expense, no matter how small.
   • BUse a single admin key that can move funds instantly.
   • CUse a smart contract that automatically pays any expense under a certain amount without any approval.
   • DUse a multi-signature wallet with a small set of elected signers for small expenses, and a token vote for large expenses.
   Reveal Solution Discussion Select an answer first
4. 23foundation · easy

   What is the main purpose of interoperability protocols in Web3?

   • ATo increase the speed of internet connections.
   • BTo provide a centralized exchange for all cryptocurrencies.
   • CTo enable communication and asset transfer between different blockchain networks.
   • DTo create a single blockchain that all applications must use.
   Reveal Solution Discussion Select an answer first
5. 24application · medium

   A developer is designing a dApp that requires a tamper-proof record of all transactions and also needs to store large files off-chain. The dApp's backend must be decentralized and not rely on a single server. Which combination of technologies should the developer use?

   • AUse a peer-to-peer file sharing network for transactions and a centralized server for file storage.
   • BUse a traditional SQL database for transactions and a cloud storage service for files.
   • CUse a blockchain to store both transactions and large files directly on-chain.
   • DUse a blockchain as the ledger for transactions and IPFS for storing large files, with the file hashes recorded on the blockchain.
   Reveal Solution Discussion Select an answer first
6. 25foundation · easy

   In the context of Web3, what does 'trustlessness' mean?

   • ASmart contracts are automatically executed without any human intervention.
   • BParticipants do not need to rely on a central authority because outcomes are enforced by code and cryptography.
   • CAll participants must be anonymous and cannot be identified.
   • DUsers must trust a central authority to validate every transaction.
   Reveal Solution Discussion Select an answer first