Question

______ are systems that provide external data sources to smart contracts.

Answer 1

Explanation:

blockchain are system that provide external data source to smart contract

Answer 2

Oracle are ‘systems’ that provide ‘external data sources’ to smart contracts.

Explanation:

• Smart contracts means those computer program which are generated to provide vital resources to the user when some specific prebuilt conditions are met.  

• Now Oracle are designed in such a way that it provides sources of information from external sources to the computer programs.  

• In this way the risk of counterparty is severely reduced. With the increase in the need of the data, Oracle became very necessary for the smart contracts.

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