Online Access Free CBSA Practice Test

Proof of Stake based blockchain systems use what design to permit valid write transactions?

• A.Validator nodes each give or pay a stake in order to write transactions, and if malicious, will lose their stake
• B.Every node on the network holds an equal stake, and if malicious, gets flagged for removal
• C.A genesis "Stake" node approves or disapproves transactions announced from other nodes
• D.Stakeholders or early product investors host nodes that approve or disapprove transactions from other nodes

You are using Geth and you would like to list the accounts controlled by the node.
What is the command?

• A.geth account list
• B.geth list accounts
• C.geth account node
• D.geth account node list

Which of the following hashing algos is considered to be the strongest?

• A.AES
• B.RSA
• C.MD-5
• D.SHA
• E.SHA-2

A Byzantine failure is the loss of a system service due to a Byzantine fault in systems that requires________.
What is required?

• A.Consensus
• B.Crypthography
• C.Bandwidth
• D.Availability

Geth uses what port to expose the Ethereum RPC Service?

• A.8545
• B.2545
• C.2096
• D.4096