# Blockchain & Data 2022 Mid Ans

- Which is not part of Statistic's 3M? `Medium`

- 3 most valuable datasets in the coming decade does NOT include: `Who won the election`

- Best way to aggregate prices in oracles from multiple feeds: `Average with confidence interval`

- Wrong about data science? `probability class will treat as unknown`

- Not property of smart contract transaction? `interchangable`

- Sexiest job= `data scientist`

- NOT blockchain feature: `Centralized`

- NOT smart contract tool: `android studio`

- NOT technical investment index: `KOL`

- What is Blockchain? `distributed ledger operation on a peer-to-peer network`

- Web3 features does NOT include? `users can arbitrage`

- Blockchain is 2nd-gen internet, it does NOT include `Gambling machine`

- Blockchain app does NOT include `facial recognition`

- Cross-boundary blockchain scenarios does NOT include `coupon nextdoor`

- Taiwan's Finance industry... `Travel insurance`

- Correct about blockchain? `Lowering counterparty risk`

- NOT use smart contract? `Ubuntu`

- who should you blame on? `yourself`

- Blockchain is NOT most different in terms of `Public key`

- DLT = `Distributed Ledger Technology`

- mining for: `for right to ledger`

- Excluding ICOs, Blockchain is `Blockchain`

- Where is full ledger placed in bitcon? `Full node`

- NOT true about blockchain? `all incorrect`

- Correct about blockchain? `Public and distributed ledger`

- Used in NXM: `Blockchain smart contract`

- NOT backed by real-world asset? `Algorithmic banking`

- WRONG about DAO? `DAO is usually hierarchical vs traditional organizaiton`

- WRONG about Web3 DAO? `Web3 DAO is permissioned`

- NOT supported for Ethereum account? `TRC 20`

- Digital signature algorithm Bitcoin used? `ECDSA`

- NOT a use case of Bitcoin? `Hand project B to TA`

- Which is NOT cloud computing service? `Hook`

- blockchain uses this cryptography `SHA256`

- NOT feature of Cloud Native? `Sharding`

- Double-spending: `person can spend the same money twice`

- How attacker gain control over proof-of-work blockchain? `control over 50%`

- to design web3-empowered parking structure, which is WRONG? `parking fee deduction CANNOT be done through user's wallet`

- correct about CART? `CART is ancestor to Tree-based AI`

- Which IRL is true below? `You'll see IRL that visualizaiton cannot be a low-hanging fruit`

- We know Uz = Ux - Uy, where U is the mean. Which one below is correct? `The conference interval requested in the given problem above`

- Prof. Liao worked on Google Trend when he was at Google. Which one below is WRONG? `Web3 data science cannot help fix the "Everybody Lies" problem.`

- 2 pillar concepts in statistics do NOT include `Benjamin Franklin`

- wrong about Berkeley's CART? `Data 8 class does NOT teach CART because it's too difficult.`

- What is Stablecoin? `Crypto that’s pegged to a fiat currency.`

- Bitcoin’s total mint amount = __`21m`; The year of last bitcoin’s minting = ___`2140`.

- According to NIST, 4 deployment models of cloud computing does NOT include `permanent`