What is a Blockchain?

A database of usable secret data

What is a node in a Blockchain? Select all that apply.

A computer running on the Blockchain

One of the great advantages of creating a new Blockchain solution is__________.

not being limited to a conventional business solution or restriction

the ability to completely customize a unique business solution

combining Blockchain technologies to fit your business solution

merging your existing network technology into a new Blockchain solution

not being limited to a conventional business solution or restriction

What are the drawbacks of using Blockchain? Select all that apply

Changing technology and the lack of a stable standard

A Blockchain provides______________.

true information by all parties involved

a trusted transaction between untrusted parties

the easiest way to conduct international transactions

only trusted banks for conducting transactions

How are blocks chained together?

Information of the previous block is embedded into the current block through hashing

By sharing the same transaction details

Information of the previous block is embedded into the current block through hashing

Information of the current block is embedded into the genesis block

How would a developer make a change to Blockchain protocol?

There is no way to change Blockchain protocol

There are no restrictions, a developer could just change the code

A developer would need to initiate a hard fork

There is no way to change Blockchain protocol

change the orderer configuration

How do consensus algorithms like Proof of Work or Proof of Stake incentivize miners to participate?

By paying the miners with cryptocurrency

By paying miners with U.S. dollars

By paying the miners with cryptocurrency

By placing their name on the Blockchain

By not charging users monthly subscription costs

How does Blockchain use hashing? Select all that apply.

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

To provide anonymity with public key cryptography

Which type of data can be stored on a Blockchain?

Romeo and Juliet: The entire play

The cryptocurrency Bitcoin is__________.

another application that runs on a Blockchain

the same as all other cryptocurrencies

replacing bartering in many parts of the world

a replacement currency for the U.S. dollar

One of Blockchain's primary uses of cryptography is___________.

providing a public and private encryption key

keeping the network configuration a secret

providing a public and private encryption key

allowing users to communicate with each other anonymously

keeping the I.P. addresses a secret

What happens if a block is confirmed at the same time?

Nodes select which block to be added to the Blockchain

The blocks splits into two chains. Blocks are then added to each chain until one chain becomes larger. The longest chain is then considered to be the Blockchain.

Nodes select which block to be added to the Blockchain

Both chains are deleted, and the unconfirmed transactions are added back to the pool

The Orderer Block confirms which block has the most confirmed transactions

Who can read records on a public Blockchain?

The users with access permissions

Transactions per second (TPS) for a Proof-of-Work Blockchain are approximately?

Only limited to the number of nodes on the network

Blockchains are being implemented in the food supply chain because ____________.

Consumers demand to know where their food comes from

It allows farm to table accountability for safety

They have the potential to provide fast, specific supplier data

It prevents food waste if a food contamination problem occurs.

What do consensus methods achieve?

It confirms that all nodes on the network are legitimate.

Anonymity in a peer to peer network

The highest level of security in a database by ensuring 51% agreement of nodes on the network.

The most efficient way of recording a transaction in any database.

It confirms that all nodes on the network are legitimate.

Where is a Blockchain's central server?

There is no central server, it is distributed

Where the Blockchain is created

Located with the owner of the server

There is no central server, it is distributed

What is a private Blockchain used instead of a public one?

To limit user access and permissions

It is less expensive to develop

It requires less mining power that a public Blockchain

To limit user access and permissions

It requires fewer administrators to manage it

A wallet that stores digital currency

A pool of unconfirmed transactions

A list or record of certificates

Why is Blockchain important?

It provides anonymity when making transactions

It allows for a secure, global, and peer to peer record of data

It provides anonymity when making transactions

Blockchain work best when they are _____________ .

Combined with other technologies

Used for financial applications

Used as an alternative to a database

One of Blockchain's primary uses of cryptography is ___________.

Providing a public and private encryption key

Keeping the IP addresses a secret

Allowing users to communicate with each other anonymously

Keeping the network configuration a secret.

Providing a public and private encryption key

Blockchain CBBF Practice Test 2 - Free Online Exam Prep & Questions

How much data can be represented by the data hash of a block?

a maximum of 20 MB

virtually any amount

not to exceed 100k bytes

the hash is only a memory location

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Blockchain CBBF Practice Test 2

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