CBBF Online Practice Questions and Answers

What does a Merkle tree provide?

A. Efficient block lookups and protection against forgery

B. Anonymity and transparency

C. A Turing complete distributed network

D. A way to deploy smart contracts onto the Blockchain

E. All of the above

Blockchain is always a better alternative to a standard database.

A. True

B. False

What is a hash function?

A. A one-way function that converts input to a unique string output

B. A function that stores data behind a key

C. A two-way function used for condensing information

D. The block-ID of the block

E. All the above

Which item(s) make up a block header?

A. The hash of the Merkle root and the header of the previous block

B. The hash of every transaction in a specific block and the next block

C. The time stamp of the block and the genesis block hash

D. The hash of the previous block

Which Blockchain protocol uses Proof of Work Consensus? Select all that apply

A. Hyperledger

B. Corda

C. Bitcoin

D. Ethereum

E. All of the above

One of the big issues that new financial transaction Blockchain solutions face is____________.

A. increasing the number of transactions per second (TPS)

B. the inability to find use cases

C. solving user identity

D. getting banks to cooperate

Blockchain 3.0 combined with the internet 3.0 will dramatically increase Blockchain use?

A. True

B. False

Blockchain is faster and more efficient than a standard database.

A. True

B. False

How does Blockchain use hashing? Select all that apply.

A. To condense information making it easy to compare large amounts of data.

B. To chain together blocks

C. To provide anonymity with public key cryptography

D. To select which node to use

E. All of the above

Which type of data can be stored on a Blockchain?

A. A financial transaction

B. A vote cast in an election

C. A personal medical record

D. Romeo and Juliet: The entire play

E. All of the above

One of Blockchain's primary uses of cryptography is___________.

A. keeping the network configuration a secret

B. providing a public and private encryption key

C. allowing users to communicate with each other anonymously

D. keeping the I.P. addresses a secret

What is a block?

A. A list or record of data

B. A wallet that stores digital currency

C. A pool of unconfirmed transactions

D. A list or record of certificates

E. All of the above

A Blockchain is a/an _____________ shared ledger distributed system.

A. Anonymous

B. Newer version of a

C. Append-only

D. Confidential

The transaction has contained in a block is the ___________.

A. Metadata used for ID

B. Same as the user private key

C. Digital fingerprint of the block

D. Unique number to show it's a Bitcoin block

The Corda distributed ledger is designed for _______________.

A. Any business transactions

B. International shipping

C. The transportation industry

D. Financial transactions