Free Blockchain CBSA Practice Exam with Questions & Answers | Set: 3

Which of the following blockchain is NOT a permissioned blockchain?

Proof of Stake consensus is most often needed for and implemented by:

If a Proof of Work blockchain such a s Bitcoin or Ethereum changed to a Proof of Stake consensus paradigm, which key component of the Proof of Work process would be eliminated?

When you considering cryptography for a blockchain what would be types of symmetric cryptography you could consider? (Select two.)

Without 100% autonomy, blockchain software and networks would serve little purpose.

When considering tokens on the Ethereum Blockchain what is the main difference between ERC20 and ERC721 tokens?

In Hyperledger there are three distinct types of nodes.

What are the three types of nodes? (Select three.)

1. Client Node: That initiates the transaction

2. Peer Nodes: Commits Transaction & keeps the data in sync across the ledger

3. Ordered: They are the communication backbones and responsible for the distribution of

the transactions.

Which of the following cryptocurrencies use an alternate consensus method called "Scrypt" to BTC's Proof of Work (POW) SHA-256 algorithm?

A centralized system is one that that is governed by a hierarchical authority.

Which of the following Blockchains would be correctly stated as centralized?

Blockchains are decentralized ledgers which, by definition, are not controlled by a central authority. Due to the value stored in these ledgers, bad actors have huge economic incentives to try and cause faults.

What algo was the original solution to the potential problem as specified by Satoshi?