The theory of Smart Contract is proposed by

• Vitalik Buterin

• Satoshi Nakamoto

• Nick Szabo

• Gavin Wood

Property of Smart Contract is(are)

• Automatically executable

• Enforceable

• Secure

• Deterministic

Ricardian contracts were initially used in a bond trading and payment system called:

• Ethereum

• Ricardo

• Bitcoin

• Hyperledger

What is the primary difference between a smart contract and a Ricardian contract?

• Smart contracts are human-readable, while Ricardian contracts are machine-readable.

• Smart contracts are executed automatically by code, while Ricardian contracts combine human-readable legal text with machine-readable code.

• Ricardian contracts require a central authority, while smart contracts are decentralized.

• Smart contracts are used only for cryptocurrency, while Ricardian contracts are used for traditional banking.

____ is an essential component of the smart contract and blockchain ecosystem for accessing external data sources.

• Ethereum

• Bitcoin

• Oracles

• None of the above

__ are common uses cases of Oracles

• Market data

• Political events

• Travel information

• Weather information

Software and network-assisted proofs are

i. TLSNotary

ii. TLS-N based mechanism

• i only

• i and ii

• ii only

• neither i nor ii

Andriod proof relies on ___ for attestation

• SafetyNet

• TLSNotary

• Andrios OS

• None of the above

Ledger proof uses ___ and ___ hardware wallets for proofs.

• Cold storage and hardware wallets

• Mobile and web wallets

• Ledger Nano S and Ledger Blue

• None of the above

A prime example of a trusted hardware-assisted proof is:

• Chainlink

• Town Crier

• Oraculos

• Ethereum 2.0