CBSA 試験問題を無料オンラインアクセス

On the Ethereum blockchain the "nonce" of a transaction:

• A.Is used to ensure that transactions by a given account are written in sequential order
• B.Holds the gas amount to be paid to the miner writing the block that contains the transaction
• C.Is reset to zero after each successfully mined blocked
• D.Must always start with four zeroes

Consider the following scenario. A startup is building a chat app for smart phones where the messages sent between users are anonymous and get destroyed within 24 hours of being sent.
Which architecture would best solve the product need?

• A.Hybrid blockchain for token management with Proof of Stake; private blockchain to persist the chat messages
• B.Ethereum for token management and chat messages; Mobile apps use JSON-RPC to communicate directly with Smart Contracts
• C.Token management for shareholders in a public blockchain; Mobile apps and data management built on existing multitier systems without use of blockchain
• D.Private blockchain to persist chat messages; Custom built token system with private blockchain smart contract

What are two cryptocurrencies that you would expect to see mining equipment with ASICS? (Select two.)

• A.Ethereum
• B.Monero
• C.Neo
• D.Litecoin
• E.Bitcoin

In blockchains there is the concept of "Group Consensus" and how many members must agree.

• A.52%
• B.74%
• C.75%
• D.51%
• E.100%

A ____________cipher basically means it is using a fixed key which replaces the message with a pseudorandom string of characters. It is basically the encryption of each letter one at a time.
What is the cipher type?

• A.RSA
• B.Parallel
• C.Block
• D.Stream