CBSA Online Practice Questions and Answers

What type of attack would be considered a very large flaw in public blockchains such as Bitcoin's Blockchain where the majority of hashpower could possibly be controlled thru an attack?

What is the specific attack Bitcoin could be exposed to?

A. 51% Attacks

B. Tether Token Hack

C. DDoS Attack

D. BIP attack

E. Parity Wallet Attack

In the Bitcoin blockchain the "block creation time" is set to 10 minutes and this can never change.

A. FALSE

B. TRUE

Addresses on a blockchain are derived by a process of hashing _________.

A. Wallet Addresses

B. Private Keys

C. IP Addresses

D. Mac addresses

E. Public Keys

You are trying to generate a random number in Ethereum blockchain. What is the best way?

A. Wikipedia

B. Coindesk

C. Coinbase

D. Randao

E. ERC20

A chaincode package that was signed at creation can be handed over to other owners for inspection and signing in Hyperledger.

Is it true that the workflow supports out-of-band signing of chaincode package?

A. TRUE

B. FALSE

Which is the right order for Ethereum Denominations?

A. Finney, Szabo, Mether, Wei

B. Gwei, Szabo, Finney, Ether

C. Finney, Szabo, Mether, Gwei

D. Wei, Finney, Szabo, Ether, Tether

Which of these technical components best represents why cryptocurrency is able to operate successfully?

A. An immutable digital ledger that is validated and distributed across many peers

B. Using API calls, cryptocurrency having a direct correlation to USD exchange rates

C. High performance computing power allows cryptocurrency to be minted just as a central government might do with fiat currency

D. Blockchain cryptocurrency transactions are always public which generates user trust and adoption

Some of the various consensus models employed by public blockchain networks include:

A. Proof of Work

B. Proof of Importance

C. Proof of Stake

D. All of the above

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

A. An immutable ledger of transactions

B. Permissions-based transactions

C. Smart Contracts/transactional code that is executed "on chain"

D. Consensus systems through Proof of Work and Proof of Stake

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