Free Blockchain CBSA Exam Dumps and CBSA Exam Questions

Question No: 11

MultipleChoice

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

Options

AHolds the gas amount to be paid to the miner writing the block that contains the transaction

BIs used to ensure that transactions by a given account are written in sequential order

CIs reset to zero after each successfully mined blocked

DMust always start with four zeroes

Question No: 12

MultipleChoice

The ''Nothing-at-Stake'' problem that could be realized by Proof of Stake networks would be caused by what?

Options

AIf all of the validator nodes are taken offline

BIf validator nodes reject all transactions

CValidator nodes approving all transactions on old and new software after a hard fork occurs

DAll of the above

Question No: 13

MultipleChoice

Which technical feature of blockchain best promotes the notion of a blockchain being ''censorship resistant''?

Options

AAn immutable ledger of transactions

BPermissions-based transactions

CSmart Contracts/transactional code that is executed ''on chain''

DConsensus systems through Proof of Work and Proof of Stake

Question No: 14

MultipleChoice

Which one of the following is a consideration that must be taken into account when using Hyperledger Fabric that you wouldn't need worry about on Ethereum?

Options

AThe fees for deploying and using Smart Contracts

BHow you will provide proper uptime for the network

CThe level of security of Smart Contracts (chaincode)

DHow often hard forks occurs on the software

Question No: 15

MultipleChoice

In Proof of Work group consensus, the ''nonce'' refers to?

Options

AThe random data to be combined with the block data which will produce a hash output matching the current difficulty level

BRandom nonsense data inserted at the end of a block to fill it completely

CThe average Bitcoin price over the last 90 days

DNone of the above

Question No: 16

MultipleChoice

In common blockchain design, blockchain addresses or ''accounts'' are generated by:

Options

AA PRNG output guaranteed to be unique

BA server/node timestamp added to a PRNG output

CCreating a hash based on a cryptographic public key and various meta data

DThe most recent block height hash combined with a cryptographic private key

Question No: 17

MultipleChoice

How are blocks of data ''chained'' together to ensure the integrity of transactions?

Options

AThe hash of the previous block is written to the header of the current block

BThe ID of the previous block is stored in the current block

CA public key is stored in each block for data decryption

DThe hash of the genesis block is kept in all block headers

Question No: 18

MultipleChoice

In common blockchain design, what is one common method to ''chain'' blocks of data together in order?

Options

AStore the hash of the previous block within the current block

BHaving the genesis node store an ordered, mutable array of block hashes

CWriting each block into a separate file on the hard disk of the node

DAssigning an order number to each block so they can be sorted when requested

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