Which of the following blockchain key components state how the transactions will be confirmed?
Answer(s): B
Validity rules (validation) state how the user and the transactions will be validated. This is predetermined by the consensus algorithm.
A chaincode package that was signed at creation can be handed over to other owners for inspection and signing in Hyperledger.Is it true that the workflow supports out-of-band signing of chaincode package?
Answer(s): A
A chaincode package that was signed at creation can be handed over to other owners for inspection and signing. The workflow supports out-of-band signing of chaincode package.
http://hyperledger-fabric.readthedocs.io/en/release-1.1/chaincode4noah.html
____________is advantageous because it presents scalability and low cost transactions, but like DPoS introduces a component of centralization.What algorithm is being referenced here?
BFT is notably implemented by Ripple (where validators are pre-selected by the Ripple foundation) and Stellar (where anyone can be a validator and trust is established by the community). BFT is advantageous because it presents scalability and low cost transactions, but like DPoS introduces a component of centralization.
https://hackernoon.com/an-overview-of-cryptocurrency-consensus-algorithms-9d744289378f
In Hashcash, miners all compete to look for a so called. " ____________"which, if provided as input (together with other parts of a block header) to a hash function, yields an output that’s numerically small enough to claim the next block reward.
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