Before a block can be added to the chain, which job of the following is not necessary? ( )
A: A cryptographic puzzle must be solved thus creating the block.
B: The computer that solves the puzzle shares the solution to all of the other computers on the network.
C: The financial institution will verify this proof of work, if correct, the block will be added to the chain.
D: The network will then verify this proof-of-work and, if correct, the block will be added to the chain.
A: A cryptographic puzzle must be solved thus creating the block.
B: The computer that solves the puzzle shares the solution to all of the other computers on the network.
C: The financial institution will verify this proof of work, if correct, the block will be added to the chain.
D: The network will then verify this proof-of-work and, if correct, the block will be added to the chain.
举一反三
- The main difference between a public block chain and a private block chain is that a private block chain doesn’t need extra verification to get access of.
- Which of the following descriptions about DNA and RNA polymerase are correct: A: RNA polymerase synthesize RNA chain using nucleoside diphosphate instead of nucleoside triphosphates. B: RNA polymerase can initiate transcription without a primer, and nucleotides are added to 5’ end of the growing RNA chain. C: RNA polymerase can add nucleotides in both 3’ or 5’ end of RNA chain. D: Both RNA polymerase and DNA polymerase can only add nucleotides to 3’ end of the polynucleotides.
- Which of the following is not an essential factor of a block?() A: Previous block header hash B: Time stamp C: Index value D: Cryptographic hash
- Which of the following is not a phase in the design of a global supply chain network?
- An supply chain is a supply chain in which all its elements share similar culture, work toward the same objectives, and benefit from financial gains.