1. What presents the greatest risk of blockchain to organizations?

a. Requires immense computing power

b. Lack of immutability

c. Lack of transparancy

d. Cost

2.If no transactions can be deleted or edited in a distributed ledger, how are transactions updated?

a. When a transaction is deleted or edited, an original copy is created and permanently stored in the ledger.

b. Transactions can be deleted and edited if consensus is reached.

c. By processing the current value based on reviewing the entire history of all related transactions.

d. The most current transaction will always be the correct one.

3.What is the purpose of a nonce?

a. Change the output hash to equal the input string.

b. Change the input string so that different hashing target candidates are produced.

c. Slow down the encryption process so transactions are only processed every 10 minutes.

d. Make the mathematics more complex to solve.

4.How is digital identity authenticated?

a. Change the input string so that different hashing target candidates are produced.

b. validating a public key against a secured database of private keys

c. unencrypting the transaction with the private key and revealing the person's name

d. each person having a unique public and private key

5.What is the biggest near-term benefit of blockchain in the financial sector?

a. efficiency

b. Reduced fraud

c. Better wide-scale integration across disparate systems

d. increased profit

6.What is the relationship between Ether and Gas?

a. Ether is used to purchase Gas, which is the processing requirement for a given smart contract.

b. Both Ether and Gas are core, dependent functions of Solidity.

c. Gas is used to purchase Ether, which is the processing requirement for a given smart contract.

d. There is no relationship between Ether and Gas.

7.Hyperledger solves which problem?

a. It does not require proof of work.

b. It provides greater privacy for permissionless blockchains.

c. It enables the use of smart contracts.

d. It provides a permissioned blockchain for enterprises.

8.After Bitcoin which of the following is the most commonly used platform?

a. Hyperleger Frabric

b. Channel

c. Frabric CA

d. Etherium

9.Channelis a private "subnet" of communication between two or more specific network members and has the following characteristics except

a. every single party inside a channel must agree about other parties

b. outside of a channel , one can't even see that there is a channel

c. channels are completely isolated

d. each channel is completely independent of the platform used

10.What is hyperledger frabric CA?

a. provides registration of entities

b. type of platform

c. type of currency

d. type of program