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WorksheetsBlockchain
Total questions: 8
Worksheet time: 4mins
What is a blockchain?
A software
A list of records, called blocks
A P2P network
An electronic payment system
What is “mining” in the context of blockchain?
The process of extracting knowledge from a dataset
The process of gathering new transactions from the network
The process of writing the new transactions to the memory-pool
The process of adding a new "block" of transactions to the blockchain file
In the context of “mining”, which are the conditions to be satisfied to write a block to the blockchain?
The block must be small
A certain time interval must be waited
A small amount of Bitcoins should be paid
The block should contain a proof-of-work (PoW)
What is the proof-of-work in the context of “mining”?
A digital signature
A legal proof of our work
The hash of the block to be mined
A hash of the block-data + nonce that is lower than a certain target
Which of the following statements regarding the “Block reward” are true?
It increases over time
Its quantity decreases over time. Eventually it will be 0
Its amount is chosen by the miner
Its amount is chosen by the transaction sender
What is a “smart contract”?
A computer program that runs inside the blockchain
A legal contract made with an electronic device
A programming interface made using some clever design patterns
A programming language
Does Solidity allow multiple inheritance?
True
False
Are "smart contracts" created without costs?
True
False
