The two main types of transactions you can perform in Hyperledger Fabric are:
A. Chaincode Read and Chaincode Write transactions
B. Deploy and Invoke transactions
C. HFRead and HFAppend transactions
D. Call and Write transactions
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. Ethereum for token management and chat messages; Mobile apps use JSON-RPC to communicate directly with Smart Contracts
B. Private blockchain to persist chat messages; Custom built token system with private blockchain smart contract
C. Token management for shareholders in a public blockchain; Mobile apps and data management built on existing multitier systems without use of blockchain
D. Hybrid blockchain for token management with Proof of Stake; private blockchain to persist the chat messages
Which of these desired outcomes is best obtained through a Blockchain solution?
A. Pending financial transactions need to be stored until completed and then should be deleted
B. A website that shows current data from various stock markets
C. A mobile app that displays information about today's weather
D. None of the above
In regard to blockchain, complete autonomy, transparency, and decentralization:
A. Are the aim of all distributed banking and financial institutions
B. Will never be achievable due to technology limitations
C. Are highly valuable in some use cases and completely undesirable in other use cases
D. Are the foundation principles that allow blockchain to operate successfully
A Blockchain network can be best categorized as:
A. A centralized network
B. A decentralized peer-to-peer network
C. A series of nodes managed by a genesis node
D. A distributed network centralized ledgers
In common blockchain design, what is one common method to "chain" blocks of data together in order?
A. Store the hash of the previous block within the current block
B. Having the genesis node store an ordered, mutable array of block hashes
C. Writing each block into a separate file on the hard disk of the node
D. Assigning an order number to each block so they can be sorted when requested
In its simplest form, user identity on a blockchain can be unique and secure:
A. By users utilizing public blockchains
B. User identity cannot yet be protected on blockchain systems
C. Through cryptographic hashing D. By users utilizing permissioned blockchains
In any cryptographic system, the key components are: the secret, the function, the key and the _______.
A. Cipher
B. Hash
C. Token
D. None of the above
Anonymity can be protected in blockchain applications by use of which of the following?
A. Centralized application hosting
B. End-to-end encryption
C. Cryptographic hashing
D. Blockchain-based data cubes
The primary difference between a blockchain and blockless solution is?
A. Blockless solutions are slower
B. Blockless solutions are less reliable
C. Transactions are not verified by the entire network in a blockless environment
D. Blockless solutions do not work on mobile devices
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