Online Access Free BLOCKCHAINF Exam Questions

The Blockchain combined with the Internet of Things (IoT) will dramatically ____________.

• A.speed up the internet
• B.increase the use of cryptocurrency
• C.make Bitcoin less expensive
• D.increase device connectivity

What is the focus or primary goal of a private Blockchain? Select all that apply.

• A.To provide anonymity in business
• B.To save money by eliminating intermediaries
• C.To provide transparency and trust for business while remaining secure
• D.To create a distributed database that allows for CRUD

Once a record is stored on the Blockchain ____________.

• A.the record is permanent
  Reference can be changed by an authorized person
• B.the record is moved to a secure server
• C.it can be changed by an authorized person
• D.the record is stored on a central node

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

• A.None of the above
• B.Both chains are deleted, and the unconfirmed transactions are added back to the pool
• C.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.
• D.Nodes select which block to be added to the Blockchain
• E.The Orderer Block confirms which block has the most confirmed transactions

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

• A.Keeping the IP addresses a secret
• B.Keeping the network configuration a secret.
• C.Allowing users to communicate with each other anonymously
• D.Providing a public and private encryption key