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Choose the correct option to complete the text below.
A blockchain oracle is a device or entity that ________ a deterministic blockchain with off-chain data (data outside of the network). Blockchain oracles are essentially third-party services that provide smart contracts with external information.
Blockchain oracles ________ as a bridge between blockchains and the outside world. They ________ it possible for smart contracts on blockchains to access off-chain data.
Due to contractual agreements and other methods of key information needed by blockchain applications, it is often imperative to have relevant information from the outside world present to execute the agreement in question. This is the point where blockchain oracles ________ play.
(Adapted from http:// makeuseof.com)
A blockchain oracle is a device or entity that ________ a deterministic blockchain with off-chain data (data outside of the network). Blockchain oracles are essentially third-party services that provide smart contracts with external information.
Blockchain oracles ________ as a bridge between blockchains and the outside world. They ________ it possible for smart contracts on blockchains to access off-chain data.
Due to contractual agreements and other methods of key information needed by blockchain applications, it is often imperative to have relevant information from the outside world present to execute the agreement in question. This is the point where blockchain oracles ________ play.
(Adapted from http:// makeuseof.com)
Resolução comentada
Concordância verbal sujeito-verbo e expressão 'come into play'.
'A device or entity that connects' pede singular, porque o antecedente de 'that' é singular. 'Blockchain oracles serve' e 'They make' pedem plural. 'Oracles come into play' também pede plural. A sequência correta é connects / serve / make / come into.
Análise das alternativas
A) 'serves' concorda com sujeito plural, errado. B) 'connect' e 'serves' estão errados. D) 'connect' e 'makes' estão errados. E) 'comes into' não concorda com 'oracles' (plural).
Referência: Subject-verb agreement; expressão 'come into play'.
Resolução comentada do VaiConcursos.