Answer these

1. Blockchain technology is powerful because it is completely secure. True of False

2. Why is citizen identity management technology moving slowly in most countries? Select an answer: a/culture b/regulation c/all of these answers d/cost

3.How might blockchain technology impact energy providers? Select an answer: a/Everyone may have the potential to earn income from providing energy. b/It may streamline energy provisioning to one decentralized autonomous organization in every country. c/It will reduce the cost of all forms of energy. d/It will enable our homes to be powered by the stored electricity in electric cars.

4.Which statement regarding Ethereum is correct? Select an answer: a/Solidity can use Gas instead of Ether. b/The Mist browser requires Gas. c/Ether and Gas are synonymous. d/Dapps can be created with or without Ether.

5.Which is true about Ripple? Select an answer: a/It must first convert to bitcoin then back to native currency. b/It moves funds between cross-border accounts almost instantly. c/Is not subject to any banking governance oversight. d/It uses a trustless model to ensure a future settlement.

6. Altchains only support altcoins, not bitcoins. Select an answer: TRUE FALSE

7.Which financial stakeholder benefits from distributed ledger technology? Select an answer: a/mortgage holders b/mortgage companies c/commercial stock traders d/all of these answers

8.Why is proof of work required for bitcoin? Select an answer: a/A user must prove the legitimacy of a transaction before it is completed. b/The rigor of the process ensures greater transaction integrity. c/A receipt must be generated to prove completion. d/Without it, there would be no proof that the miner existed.

9.What does "trustless" mean? Select an answer: a/The absence of falsehoods provides confidence. b/The system uses reliables sources. c/The system relies on strength of reputation. d/The system does not rely on trust.

10.Which statement about ledgers is true? Select an answer: a/Every distributed ledger participant has a full version of the database that contains all encrypted private keys. b/Every distributed ledger participant has a full version of the database with most attributes in clear text. c/Every distributed ledger participant has a version of the database that contains their full transactions and only references to everyone else's. d/Every distributed ledger participant has a full version of the database that is fully compressed using SHA-256 on each attribute.

11.What is true about SHA-256? Select an answer: a/It stands for Secure Hash Algorithm and is 256-bits. b/It stands for Shared Hash Algorithm and is 256-bits. c/It stands for Secure Hash AES and is 256-bits. d/It stands for Secure Hash Algorithm and is 256 characters in length.

12.Which statement about PKI is true? Select an answer: a/A unique private key is generated each time by the receiver. b/Anyone who steals a public key can decrypt data in transit. c/Digital signatures expire upon decryption. d/A private key is never used by anyone else but you.

13.Which of these is currently not a limitation of blockchain technology? Select an answer: a/performance b/immutability c/transaction speed d/lack of standards

14.What is not a specific quality of a blockchain database? Select an answer: a/distributed b/eliminates central authorities c/Transactions are only added and removed by consensus. d/uses encryption

15.Blockchain is to bitcoin as the internet is to _____. Select an answer: a/TCP/IP b/Peer-to-Peer c/Flat Files d/FTP